Safety of Flight CH-47-02-03

 

         

 


UNCLASSIFIED

MSG DTG 252045Z JAN 02

FROM CDRAMCOM, REDSTONE ARSENAL, AL  //AMSAM-SF-A//

SUBJECT - SAFETY OF FLIGHT, TECHNICAL, RCS CSGLD-1860(R1), ALL H-
47 SERIES AIRCRAFT, REVISION TO CH-47-02-02, INSPECTION OF THE 
ROTARY WING HEAD TIE BAR ASSEMBLY AND ROTOR TACHOMETER, CH-47-02-
03 (TB 1-1520-240-20-141).
                             NOTE
THIS MESSAGE IS ISSUED IAW AR 95-1, 1 SEP 97, CHAPTER 6.  THIS 
MESSAGE HAS NOT BEEN TRANSMITTED TO UNITS SUBORDINATE TO 
ADDRESSEES.  ADDRESSEES SHOULD IMMEDIATELY RETRANSMIT THIS 
MESSAGE TO ALL SUBORDINATE UNITS, ACTIVITIES OR ELEMENTS AFFECTED 
OR CONCERNED.  THE RETRANSMITTAL SHALL REFERENCE THE MESSAGE.  
ACTION ADDRESSEES WILL IMMEDIATELY VERIFY THIS TRANSMISSION TO 
CDR, AMCOM, ATTN:  AMSAM-SF-A (SOF COMPLIANCE OFFICER).
1.  PRIORITY CLASSIFICATION -
                             NOTE
IAW AR 95-1, PARAGRAPH 6-6A, MACOM COMMANDERS MAY AUTHORIZE 
TEMPORARY EXCEPTION FROM MESSAGE REQUIREMENTS.  EXCEPTION MAY 
ONLY OCCUR WHEN COMBAT OPERATIONS OR MATTER OF LIFE OR DEATH IN 
CIVIL DISASTERS OR OTHER EMERGENCIES ARE SO URGENT THAT THEY 
OVERRIDE THE CONSEQUENCES OF CONTINUED AIRCRAFT OPERATION.
    A.  AIRCRAFT IN USE - UPON RECEIPT OF THIS MESSAGE, MAKE THE 
FOLLOWING ENTRIES ON THE DA FORM 2408-13-1.  COMMANDERS WHO ARE 
UNABLE TO COMPLY WITH THE REQUIREMENTS OF THIS MESSAGE WITHIN THE 
TIME FRAME SPECIFIED WILL UPGRADE THE AFFECTED AIRCRAFT STATUS 
SYMBOL TO A RED //X//.
        (1)  FOR ALL H-47 - ENTER A RED HORIZONTAL DASH //-// 
STATUS SYMBOL WITH THE FOLLOWING STATEMENT: "INSPECT TIE BAR 
ASSEMBLIES IAW CH-47-02-03 (TB 1-1520-240-20-141) PRIOR TO THE 
NEXT FLIGHT."
        (2)  FOR ALL H-47 - ENTER A CIRCLED RED //X// STATUS 
SYMBOL WITH THE FOLLOWING STATEMENT: "AIRCRAFT RESTRICTED TO 111 
PERCENT TRANSIENT ROTOR SPEED IAW CH-47-02-03 (TB 1-1520-240-20-
141)."
        (3)  FOR H-47D AND H-47F ONLY - ENTER A RED DIAGONAL 
\\/\\ STATUS SYMBOL WITH THE FOLLOWING STATEMENT: "REWORK ALL 
ROTOR TACHOMETERS IAW CH-47-02-03 (TB 1-1520-240-20-141) NLT 26 
FEBRUARY 2002."
    B.  AIRCRAFT IN MAINTENANCE FACILITY -
        (1) AIRCRAFT IN AVUM, AVIM OR DEPOT - SAME AS PARA 1A.
        (2) AIRCRAFT AT CONTRACTOR FACILITY - BOEING WILL INSPECT 
DD 250 AIRCRAFT PRIOR TO THOSE AIRCRAFT DEPARTING FOR FERRY TO 
FINAL DESTINATION.
    C.  AIRCRAFT IN TRANSIT -
                             NOTE
            FOR AIRCRAFT AWAY FROM HOME STATION, THIS
            MESSAGE AUTHORIZES A ONE TIME FLIGHT, WITH
            INTERMEDIATE STOPS, TO RETURN TO THE NEAREST
            SECURED MAINTENANCE FACILITY/HOME STATION.
        (1)  SURFACE/AIR SHIPMENT - SAME AS PARA 1A.
        (2)  FERRY STATUS - SAME AS PARA 1A.
    D.  MAINTENANCE TRAINERS (CATEGORY A AND B) - COMPLY NLT 25 
JANUARY 2004.
    E.  COMPONENT/PARTS IN STOCK AT ALL LEVELS (DEPOT AND OTHERS) 
INCLUDING WAR RESERVES - UPON RECEIPT OF THIS MESSAGE, DEPOT AND 
MATERIEL ACTIVITY COMMANDERS WILL ENSURE THE MATERIEL CONDITION 
TAGS OF ALL ITEMS IN ALL CONDITION CODES LISTED IN PARAGRAPHS 6 
AND 7 ARE ANNOTATED TO READ: " CH-47-02-03 (TB 1-1520-240-20-
141), INSPECTION OF TIE BAR ASSEMBLIES AND ROTOR TACHOMETERS NOT 
COMPLIED WITH."
        (1) WHOLESALE STOCK - N/A.
        (2) RETAIL STOCK - UPON RECEIPT OF THIS MESSAGE, 
COMMANDERS AND FACILITY MANAGERS MAINTAINING RETAIL STOCK AT 
INSTALLATION LEVEL AND BELOW SHALL CONTACT THE SUPPORTED AVIATION 
UNIT TO PERFORM THE PROCEDURES REQUIRED IAW PARAGRAPHS 8 AND 9 ON 
SUSPECT MATERIEL.  DISPOSE OF DISCREPANT MATERIEL IAW PARA 10.  
REPORT COMPLIANCE WITH THIS MESSAGE IAW PARAGRAPH 14C(2) NLT 8 
FEBRUARY 2002.
    F.  COMPONENTS/PARTS IN WORK (DEPOT LEVEL AND OTHERS) - DEPOT 
AND OTHER MAINTENANCE ACTIVITY COMMANDERS WILL ENSURE ITEMS 
LISTED IN PARAGRAPHS 6 AND 7 ARE NOT ISSUED UNTIL THEY ARE IN 
COMPLIANCE WITH THIS MESSAGE.
2.  TASK/INSPECTION SUSPENSE DATE -
    A.  COMPLETE THE INSPECTION IAW PARAGRAPH 8A PRIOR TO THE 
NEXT FLIGHT.
    B.  COMPLETE THE INSPECTION IAW PARAGRAPH 8B AT THE NEXT 
ROTOR HEAD REMOVAL, BUT NLT THAN THE NEXT PHASE INSPECTION OR 25 
JANUARY 2004, WHICHEVER OCCURS FIRST.
    C.  COMPLETE THE INSPECTION FOR ALL H-47D/F AIRCRAFT IAW PARA 
8C NLT 25 FEBRUARY 2002.
3.  TAMMS REPORTING COMPLIANCE SUSPENSE DATE - REPORT COMPLIANCE 
IAW PARA 14A(1) NLT 31 JANUARY 2002.
4.  SUMMARY OF PROBLEM -
    A.  HISTORY - CH-47-02-02 WAS ISSUED ON 24 JANUARY 2002 
REQUIRING INSPECTION OF THE TIE BAR ASSEMBLY AND ROTOR 
TACHOMETER.  THIS MESSAGE SUPERCEDES THE REQUIREMENTS IN CH-47-
02-02.  CHANGES HAVE BEEN MADE TO PARA 1C, 8A, 8B, 9A, AND 10D.
        (1)  TIE BAR PLATE FAILURE - REPORTS FROM THE FIELD ON 
TIE BAR ASSEMBLIES INDICATE THAT TIE BAR PLATE CRACKS HAVE 
OCCURRED MUCH EARLIER THAN THE RETIREMENT LIFE OF 8693 HOURS.  
EVEN THOUGH THE TIE BAR ASSEMBLY IS CURRENTLY INSPECTED AT 1200 
HOURS AND AT THE 2400 HOUR OVERHAUL, IT IS POSSIBLE THAT SOME 
FIELDED TIE BARS MAY HAVE TIE BAR PLATES WHICH HAVE CRACKED.
        (2)  TIE BAR OVER SPEED DAMAGE - TESTING HAS SHOWN THAT 
INITIAL DEFORMATION OF THE ROTARY WING HEAD TIE BAR ASSEMBLY MAY 
OCCUR AT A POINT JUST ABOVE 111 PERCENT ROTOR RPM.  CURRENTLY, 
THE 145ES008 ROTOR TACHOMETERS (ALL H-47D/F) AND MULTI FUNCTION 
DISPLAYS (MFD) (MH-47E) INDICATE 115 PERCENT RPM AS THE MAXIMUM 
TRANSIENT ROTOR SPEED LIMIT.  BECAUSE OF THIS, SOME TIE BAR 
ASSEMBLIES MAY HAVE ALREADY BEEN DAMAGED DUE TO EXCEEDING 111 
PERCENT RPM.
    B.  MANPOWER/DOWNTIME AND FUNDING IMPACTS - SEE PARA 12.
    C.  THE PURPOSE OF THIS MESSAGE IS TO -
        (1)  TIE BAR ASSEMBLY -
             (A)  REDUCE THE RETIREMENT LIFE OF THE ASSEMBLY TO 
4800 HOURS TIME SINCE NEW (TSN).
             (B)  REPLACE ALL ASSEMBLIES WITH MORE THAN 4800 
HOURS TSN.
             (C)  INSPECT ALL ASSEMBLIES WITH LESS THAN 4800 
HOURS TSN FOR CRACKS.
        (2)  MAXIMUM TRANSIENT ROTOR SPEED LIMIT -
             (A)  REQUIRE REWORK OF ALL 145ES008 ROTOR 
TACHOMETERS (ALL H-47D/F) AND UPDATE SOFTWARE (MH-47E) TO 
INDICATE THE MAX TRANSIENT ROTOR SPEED OF 111 PERCENT RPM.
             (B)  CHANGE THE MAX TRANSIENT ROTOR SPEED TO BE 111 
PERCENT RPM IN THE OPERATOR'S MANUALS.
             (C)  ESTABLISH A CONDITIONAL INSPECTION OF THE TIE 
BAR ASSEMBLY IF 111 PERCENT ROTOR SPEED IS EXCEEDED.
5.  END ITEMS TO BE INSPECTED - ALL H-47 SERIES AIRCRAFT.
6.  ASSEMBLY COMPONENTS TO BE INSPECTED -
       NOMENCLATURE              PART NO.           NSN
    ROTOR HEAD ASSEMBLY       145R2003-ALL          ALL
    ROTOR HEAD ASSEMBLY       145R2004-ALL          ALL
    TIE BAR ASSEMBLY          114R2155-1      1615-00-740-6480
7.  PARTS TO BE INSPECTED -
       NOMENCLATURE             PART NO.           NSN
    TACHOMETER INDICATOR      145ES008-2      6680-01-127-2481
8.  INSPECTION PROCEDURES -
                             NOTE
            READ AND COMPLETE ALL PARAGRAPH 8 INSPECTION
            PROCEDURES FOR EACH PART PRIOR TO PROCEEDING
            TO THE CORRECTION PROCEDURES IN PARAGRAPH 9.
    A.  PRIOR TO THE NEXT FLIGHT, INSPECT THE ROTOR HEAD DA FORM 
2408-16 TO DETERMINE THE TSN OF ALL TIE BAR ASSEMBLIES.
        (1)  IF TSN IS LESS THAN 4800 HOURS -
             (A)  CHANGE THE ROTOR HEAD DA FORM 2408-16 TO 
INDICATE A NEW RETIREMENT LIFE FOR THE TIE BAR ASSEMBLY OF 4800 
HRS TSN.
             (B)  CLEAR THE RED HORIZONTAL DASH //-// ENTRY 
REQUIRED IAW PARA 1A(1) OF THIS MESSAGE AND ENTER A NEW RED 
HORIZONTAL DASH //-// STATUS SYMBOL WITH THE FOLLOWING STATEMENT: 
"INSPECT ALL TIE BAR ASSEMBLIES IAW PARA 8B, CH-47-02-03 (TB 1-
1520-240-20-141) AT THE NEXT ROTOR HEAD REMOVAL, BUT NLT THAN THE 
NEXT PHASE INSPECTION OR 25 JANUARY 2004.
        (2)  IF TSN IS EQUAL TO OR GREATER THAN 4800 HOURS, 
CORRECT IAW PARA 9A.
                             NOTE
            ROTOR HEADS RECEIVED FROM SUPPLY AFTER THE
            MSG DTG WHICH HAVE ZERO HOURS TIME SINCE
            OVERHAUL (TSO) DO NOT REQUIRE INSPECTION
            OF THE TIE BAR ASSEMBLIES IAW PARA 8B.
    B.  AT THE NEXT ROTOR HEAD REMOVAL, BUT NLT THAN THE NEXT 
PHASE INSPECTION OR 25 JANUARY 2004, WHICHEVER OCCURS FIRST, 
INSPECT THE TIE BAR ASSEMBLIES AS FOLLOWS -
        (1)  REMOVE TIE BAR ASSEMBLIES IAW TM 55-1520-240-23, 
TASK 5-23.1 (H-47D/F), OR TM 1-1520-252-23, TASK 5-30 (MH-47E).
                             NOTE
            THE PROCEDURE IN PARA 8B(2) IS IAW CHANGE
            NUMBER 47 FOR THE H-47D/F, AND CHANGE
            NUMBER 17 FOR THE MH-47E.
        (2)  INSPECT TIE BAR ASSEMBLIES IAW TM 55-1520-240-23, 
TASK 5-23.1.1 (H-47D/F), OR TM 1-1520-252-23, TASK 5-31 (MH-47E).
        (3)  USING 10X MAGNIFICATION, VISUALLY INSPECT TIE BAR 
PLATES FOR CRACKS.  NO CRACKS ALLOWED.
        (4)  INSPECT THE FOUR TIE BAR SLOTS AS FOLLOWS - USING A 
BORESCOPE WITH A RIGID RIGHT ANGLE PROBE, INSERT THE BORESCOPE 
PROBE IN EACH SLOT.  EXAMINE THE SLOTS FOR CRACKS ALONG THE FULL 
DEPTH AND SPAN.  RECOMMEND THE PROBE NOT EXCEED 0.110 INCH 
DIAMETER.  IF A SUITABLE BORESCOPE AND PROBE ARE NOT AVAILABLE, 
VISUALLY INSPECT EACH SLOT USING A LIGHT SOURCE.
        (5)  IF A TIE BAR ASSEMBLY FAILS AN INSPECTION IAW PARA 8B, 
CORRECT IAW PARA 9A.
        (6)  IF NO DAMAGE IS FOUND -
             (1)  REINSTALL THE ROTARY WING HEAD TIE BAR 
ASSEMBLIES IAW TM 55-1520-240-23, TASK 5-23.2 (H-47D/F) OR TM 1-
1520-252-23, TASK 5-32 (MH-47E).
             (2)  CLEAR THE RED HORIZONTAL DASH //-// ENTRY.
    C.  PRIOR TO 25 FEBRUARY 2002, INSPECT THE AIRCRAFT ROTOR 
TACHOMETER -
        (1)  FOR THE 145ES008-2 ROTOR TACHOMETER (H-47D/F) - 
CORRECT IAW PARA 9B.
                             NOTE
            CURRENTLY ALL 145ES008-2 ROTOR TACHOMETERS
            ARE MARKED TO INDICATE THE MAXIMUM TRANSIENT
            ROTOR SPEED AT 115 PERCENT.  EVENTUALLY NEW
            ROTOR TACHOMETERS WILL BE AVAILABLE THAT WILL
            BE MARKED AT 111 PERCENT.
        (2)  FOR THE MULTI FUNCTION DISPLAY (MFD) SOFTWARE (MH-
47E) - CORRECT IAW PARA 9C.
9.  CORRECTION PROCEDURES -
                             NOTE
            ENSURE THAT REPLACEMENT TIE BAR ASSEMBLIES
            ARE INSPECTED AND IN COMPLIANCE WITH THIS
            SOF PRIOR TO INSTALLATION.
    A.  IF THE TSN IS EQUAL TO OR MORE THAN 4800 HRS, OR IF A TIE 
BAR ASSEMBLY FAILS AN INSPECTION IAW PARA 8B -
        (1)  CHANGE THE ROTOR HEAD DA FORM 2408-16 TO INDICATE A 
NEW RETIREMENT LIFE FOR TIE BAR ASSEMBLY OF 4800 HRS TSN.
        (2)  CLEAR THE RED HORIZONTAL DASH //-// ENTRY AND ENTER 
A RED //X// STATUS SYMBOL WITH THE FOLLOWING STATEMENT: "REPLACE 
THE ROTARY WING HEAD TIE BAR ASSEMBLIES IAW CH-47-02-03 (TB 1-
1520-240-20-141)."
        (3)  SUBMIT A CATEGORY I DEFICIENCY REPORT ON ANY TIE BAR 
ASSEMBLY THAT HAS FAILED THE INSPECTION REQUIRED IAW PARA 8B DUE 
TO CRACKS.
        (4)  IF TSN IS EQUAL TO OR MORE THAN 4800 HOURS, CONTACT 
THE TECH POC IN PARA 16A FOR DISPOSITION INSTRUCTIONS.
        (5)  REINSTALL THE ROTARY WING HEAD TIE BAR ASSEMBLIES 
IAW TM 55-1520-240-23, TASK 5-23.2 (ALL H-47D/F) OR TM 1-1520-
252-23, TASK 5-32 (MH-47E).
        (6)  CLEAR THE RED //X// ENTRY.
    B.  FOR ALL H-47D AND H-47F HELICOPTERS - REWORK ALL ROTOR 
TACHOMETERS AS FOLLOWS -
        (1)  REMOVE ROTOR TACHOMETERS FROM THE AIRCRAFT IAW TM 
55-1520-240-23, TASK 8-88.
        (2)  ON A SUITABLE WORKBENCH, CLEAN GLASS COVER WITH 
ISOPROPYL ALCOHOL, TT-I-735 (OR EQUIVALENT).
        (3)  APPLY A 3/16-INCH LONG BY 1/16-INCH WIDE PIECE OF 
RED TAPE (NSN 7510-00-550-7126 OR EQUIVALENT) AT THE 111 PERCENT 
RPM RANGE MARKING ON THE GLASS FACE OF EACH ROTOR TACHOMETER.
        (4)  PAINT A WHITE INDEX MARK NOT OVER 1/16 INCH WIDE 
ACROSS THE JOINT BETWEEN THE GLASS AND THE CASE AT THE BOTTOM OF 
THE CENTER (6 O'CLOCK) POSITION USING MIL-L-19537 WHITE LACQUER 
(OR EQUIVALENT).
        (5)  APPLY A COAT OF MIL-V-173 VARNISH (OR EQUIVALENT) 
OVER THE TAPE AND ALLOW TO DRY.
        (6) REINSTALL THE ROTOR TACHOMETERS IN THE AIRCRAFT IAW 
TM 55-1520-240-23, TASK 8-89.
        (7)  AFTER COMPLETION OF THE MODIFICATION OF BOTH ROTOR 
TACHOMETERS, THE RED DIAGONAL \\/\\ AND CIRCLED RED //X// ENTRIES 
WILL BE CLEARED.
    C.  FOR ALL MH-47E HELICOPTERS -
        (1)  A SOFTWARE CHANGE WILL BE DEVELOPED TO INCORPORATE 
THE 111 PERCENT MAXIMUM TRANSIENT ROTOR SPEED LIMIT.
        (2)  AFTER INSTALLATION OF THE NEW AVIONICS SUITE, THE 
CIRCLED RED //X// ENTRIES WILL BE CLEARED.
10.  SUPPLY/PARTS AND DISPOSITION -
     A.  PARTS REQUIRED - ITEMS CITED IN PARAGRAPHS 6 MAY BE 
REQUIRED TO REPLACE DEFECTIVE ITEMS.
     B.  REQUISITIONING INSTRUCTIONS - REQUISITION REPLACEMENT 
PARTS USING NORMAL SUPPLY PROCEDURES.  ALL REQUISITIONS SHALL USE 
PROJECT CODE (CC 57-59) "X13" (X-RAY, ONE, THREE).
                              NOTE
            PROJECT CODE "X13" IS REQUIRED TO TRACK
            AND ESTABLISH A DATA BASE OF STOCK FUND
            EXPENDITURES INCURRED BY THE FIELD AS A
            RESULT OF MESSAGE ACTIONS.
     C.  BULK AND CONSUMABLE MATERIALS - THE FOLLOWING MATERIALS 
WILL BE REQUIRED -
         (1)  TAPE, PRESSURE SENSITIVE ADHESIVE, COLOR RED, P/N 
L-T-90, NSN 7510-00-550-7126(OR EQUIVALENT).
         (2)  VARNISH, P/N MIL-V-173 (OR EQUIVALENT), NSN 8010-
00-180-6343.
         (3)  LACQUER, WHITE, COLOR NO. 17925(OR EQUIVALENT), P/N
MIL-L-19537 (OR EQUIVALENT), NSN 8010-00-935-6608.
         (4)  ALCOHOL, ISOPROPYL, COMMERCIAL GRADE, P/N TT-I-735 
(OR EQUIVALENT), NSN 6810-00-753-4993.
         (5)  BOLT, P/N 114R2162-1, NSN 5306-00-926-5684.
         (6)  NUT, SELF-LOCK, P/N MS21083N4, NSN 5310-00-903-
8282.
         (7)  BOLT, P/N AN4H30A, NSN 5306-00-182-2022.
         (8)  SEAL, P/N 114R2142-3, NSN 5330-00-913-0933.
         (9)  SEAL, P/N 114RS215-1, NSN 5330-00-248-5142.
     D.  DISPOSITION -
         (1)  IF CRACKS ARE FOUND IN THE TIE BAR ASSEMBLY, 
DISPOSITION INSTRUCTIONS WILL BE PROVIDED UPON RECEIPT OF THE 
CATEGORY I DEFICIENCY REPORT.
         (2)  CONTACT THE LOG POC IN PARA 16B FOR DISPOSITION 
INSTRUCTION FOR ALL OTHER TIE BAR ASSEMBLIES THAT FAIL THE 
INSPECTIONS IAW PARA 8 OF THIS MESSAGE.
         (3)  IF TIE BAR ASSEMBLY TSN IS EQUAL TO OR MORE THAN 
4800 HOURS, CONTACT THE TECH POC IN PARA 16A FOR DISPOSITION 
INSTRUCTIONS.
     E.  DISPOSITION OF HAZARDOUS MATERIAL - N/A.
11.  SPECIAL TOOLS AND FIXTURES REQUIRED - AS REQUIRED.
12.  APPLICATION -
     A.  CATEGORY OF MAINTENANCE - AVUM.  AIRCRAFT DOWNTIME WILL 
BE CHARGED TO AVUM MAINTENANCE.
     B.  ESTIMATED TIME REQUIRED -
         (1)  TIME TO COMPLETE RECORDS CHECK - TOTAL OF 0.5 HOURS 
USING 1 PERSON.
         (2)  TIME TO COMPLETE INSPECTION OF THE TIE BAR ASSY -
              (A)  TOTAL OF 124 MAN-HOURS USING 8 PERSONS.
              (B)  TOTAL OF 20.0 HOURS DOWNTIME FOR ONE END ITEM.  
DOWNTIME INCLUDES TIME REQUIRED MAINTENANCE TEST FLIGHT.
         (3)  TIME FOR TACHOMETER REWORK -
              (A)  TOTAL OF 1 MAN-HOURS USING 1 PERSONS.
              (B)  TOTAL OF 1 HOURS DOWNTIME FOR ONE END ITEM.
     C.  ESTIMATED COST IMPACT TO THE FIELD -
    NOMENCLATURE      PART NO./NSN   QTY    COST EA.      TOTAL $
    TIE BAR ASSEMBLY  114R2155-1      6    $5675.15    $34,050.90
                  1615-00-740-6480
    TIE BAR PIN       114R2168-3      6       33.34        200.04
                  1615-00-740-6477
    TIE BAR PIN       114R2168-4      6       63.05        378.30
                  1615-01-115-3619
                             TOTAL COST PER AIRCRAFT = $34,692.24
     D.  TB/MWOS TO BE APPLIED PRIOR TO OR CONCURRENTLY WITH THIS 
INSPECTION - N/A.
     E.  PUBLICATIONS WHICH REQUIRE CHANGE AS A RESULT OF THIS 
INSPECTION - THE FOLLOWING PUBLICATIONS SHALL BE CHANGED TO 
REFLECT THIS MESSAGE.  A COPY OF THIS MESSAGE SHALL BE INSERTED 
IN THE APPROPRIATE TM AS AUTHORITY TO IMPLEMENT THE CHANGE UNTIL 
THE PRINTED CHANGE IS RECEIVED.
         (1)  TM 55-1520-240-10, OPERATORS MANUAL FOR ARMY CH-47D 
HELICOPTER - CHANGE MAXIMUM TRANSIENT ROTOR SPEED LIMIT TO 111 
PERCENT RPM.
         (2)  TM 55-1520-240-23, AVIATION UNIT AND AVIATION 
INTERMEDIATE MAINTENANCE MANUAL, CH-47D HELICOPTER -
              (A)  TASK 1-91, PAGE 1-284, CHANGE THE RETIREMENT 
SCHEDULE HOURS FOR THE FORWARD AND AFT TIE BAR ASSEMBLY, P/N 
114R2155-1, TO BE 4800 HOURS TSN.
              (B)  ADD THE FOLLOWING CONDITIONAL INSPECTION TO 
TASK 1-92.
                   (1)  THE INSPECTION FREQUENCY SHALL READ - 
"WHEN ROTOR RPM EXCEEDS 111 PERCENT, BUT DOES NOT EXCEED 115 
PERCENT RPM."
                   (2)  THE INSPECTION REQUIREMENT SHALL READ - 
"INSPECT THE ROTOR HEAD TIE BAR ASSEMBLIES PER TASK 5-23.1.1 AT 
THE NEXT ROTOR HEAD REMOVAL, BUT NLT COMPLETION OF NEXT PHASED 
MAINTENANCE".
              (C)  TASK 1-92, REFERENCE 55 - CHANGE "SPEED" TO 
READ "RPM".
              (D)  TASK 5-23.1.1, PAGE 5-94.2.1, ADD "BORESCOPE" 
TO TOOLS LIST.
              (E)  TASK 5-23.1.1, PAGE 5-94.2.1, CHANGE PARA 2.A. 
TO READ AS FOLLOWS: "USING 10X MAGNIFICATION, VISUALLY INSPECT 
TIE BAR PLATES FOR CRACKS.  NO CRACKS ALLOWED."
              (F) TASK 5-23.1.1, PAGE 5-94.2.1, ADD PARA 3 AS 
FOLLOWS - "3.  INSPECT THE FOUR SLOTS IN THE TIE BAR ASSEMBLY AS 
FOLLOWS -
               A.  USING A BORESCOPE WITH A RIGID RIGHT ANGLE 
PROBE, INSERT THE BORESCOPE PROBE IN EACH SLOT.  EXAMINE THE 
SLOTS FOR CRACKS ALONG THE FULL DEPTH AND SPAN.
                             NOTE
            RECOMMEND THE PROBE NOT EXCEED 0.110 INCH DIAMETER.
               B.  IF A SUITABLE BORESCOPE AND PROBE ARE NOT 
AVAILABLE, VISUALLY INSPECT EACH SLOT USING A LIGHT SOURCE.
               C.  REJECT TIE BAR ASSEMBLY IF ANY CRACKS ARE 
DETECTED."
         (3)  TM 1-1520-252-10, OPERATOR'S MANUAL FOR ARMY MH-47E 
HELICOPTER - CHANGE MAXIMUM TRANSIENT ROTOR SPEED LIMIT TO 111 
PERCENT RPM.
         (4)  TM 1-1520-252-23, AVIATION UNIT AND AVIATION 
INTERMEDIATE MAINTENANCE MANUAL, MH-47E HELICOPTER -
              (A)  TASK 1-99, PAGE 3, CHANGE THE RETIREMENT 
SCHEDULE HOURS FOR THE FORWARD AND AFT TIE BAR ASSEMBLY, P/N 
114R2155-1, TO BE 4800 HOURS TSN.
              (B)  ADD THE FOLLOWING CONDITIONAL INSPECTION TO 
TASK 1-100.
                   (1)  THE INSPECTION FREQUENCY SHALL READ - 
"WHEN ROTOR RPM EXCEEDS 111 PERCENT, BUT DOES NOT EXCEED 115 
PERCENT RPM."
                   (2)  THE INSPECTION REQUIREMENT SHALL READ - 
"INSPECT THE ROTOR HEAD TIE BAR ASSEMBLIES PER TASK 5-31 AT THE 
NEXT ROTOR HEAD REMOVAL, BUT NLT COMPLETION OF NEXT PHASED 
MAINTENANCE".
              (C)  TASK 1-100, REFERENCE 56 - CHANGE "SPEED" TO 
READ "RPM".
              (D)  TASK 5-31, PAGE 2, CHANGE PARA 2.A. TO READ AS 
FOLLOWS: "USING 10X MAGNIFICATION, VISUALLY INSPECT TIE BAR 
PLATES FOR CRACKS.  NO CRACKS ALLOWED."
13.  REFERENCES -
     A.  DA PAM 738-751, 15 MAR 99.
     B.  TM 55-1520-240-23, AVIATION UNIT AND AVIATION 
INTERMEDIATE MAINTENANCE MANUAL, CH-47D HELICOPTER.
     C.  TM 55-1520-240-10, OPERATOR'S MANUAL FOR ARMY CH-47D 
HELICOPTER.
     E.  TM 1-1520-252-23, AVIATION UNIT AND AVIATION 
INTERMEDIATE MAINTENANCE MANUAL, MH-47E HELICOPTER.
     F.  TM 1-1520-252-10, OPERATOR'S MANUAL FOR ARMY MH-47E 
HELICOPTER.
14.  RECORDING AND REPORTING REQUIREMENTS -
     A.  AIRCRAFT -
         (1)  TAMMS REPORTING COMPLIANCE SUSPENSE - UPON ENTERING 
REQUIREMENTS OF THIS MESSAGE ON DA FORM 2408-13-1 FOR ALL 
EFFECTED AIRCRAFT, COMMANDERS WILL FORWARD A PRIORITY MESSAGE, 
FAX OR EMAIL TO CDR, AMCOM, ATTN:  AMSAM-SF-A (SOF COMPLIANCE 
OFFICER), REDSTONE ARSENAL, AL 35898-5000, IAW AR 95-1, NLT DATE 
SPECIFIED IN PARAGRAPH 3.  FAX NUMBER IS DSN 897-2111 OR (256) 
313-2111.  EMAIL ADDRESS IS "SAFEADM@REDSTONE.ARMY.MIL".  THE 
REPORT WILL CITE THIS MESSAGE AND TB NUMBER, DATE OF ENTRY IN DA 
FORM 2408-13-1, THE AIRCRAFT MISSION DESIGN SERIES AND SERIAL 
NUMBERS OF AIRCRAFT IN NUMERICAL ORDER.
         (2)  TASK/INSPECTION REPORTING SUSPENSE - N/A.
     B.  WHOLESALE SPARE PARTS/ASSEMBLIES - N/A.
     C.  RETAIL SPARE PARTS/ASSEMBLIES -
         (1)  REPORTING MESSAGE RECEIPT - N/A.
         (2)  TASK/INSPECTION REPORTING SUSPENSE - COMMANDERS AND 
FACILITY MANAGERS WILL REPORT INSPECTION RESULTS TO THE 
LOGISTICAL POINT OF CONTACT IN PARA 16B NLT DATE SPECIFIED IN 
PARAGRAPH 1E(2).  REPORT THE QUANTITY INSPECTED BY CONDITION CODE 
AND THE RESULTING CONDITION CODE.  REPORT BY EMAIL OR FAX AND 
PROVIDE LOCAL POINT OF CONTACT.
     D.  THE FOLLOWING FORMS ARE APPLICABLE AND ARE TO BE 
COMPLETED IAW DA PAM 738-751, 15 MAR 99 -
                             NOTE 
            ULLS-A USERS WILL USE APPLICABLE "E" FORMS.
         (1)  DA FORM 2408-5-1, EQUIPMENT MODIFICATION RECORD. 
(ROTOR HEAD ASSEMBLY).
         (2)  DA FORM 2408-13, AIRCRAFT STATUS INFORMATION 
RECORD.
         (3)  DA FORM 2408-13-1, AIRCRAFT INSPECTION AND 
MAINTENANCE RECORD.
         (4)  DA FORM 2408-15, HISTORICAL RECORD FOR AIRCRAFT (TO 
RECORD OF ROTOR TACHOMETER PORTION OF MESSAGE).
         (5)  DA FORM 2408-16, AIRCRAFT COMPONENT HISTORICAL 
RECORD.
         (6)  DA FORM 2410, COMPONENT REMOVAL AND REPAIR/OVERHAUL 
RECORD (ONLY IF ROTOR HEAD OR TIE BAR ASSEMBLIES ARE 
REMOVED/REPLACED).
         (7)  DD FORM 1574/DD FORM 1574-1, SERVICEABLE TAG/LABEL - 
MATERIEL (COLOR YELLOW).  ANNOTATE REMARKS BLOCK WITH "INSPECTED 
SERVICEABLE IAW CH-47-02-03 (TB 1-1520-240-20-141)."
         (8)  DD FORM 1577-2/DD FORM 1577-3, UNSERVICEABLE 
(REPARABLE) TAG/LABEL - MATERIEL (COLOR GREEN).  ANNOTATE REMARKS 
BLOCK WITH UNSERVICEABLE IAW CH-47-02-03 (TB 1-1520-240-20-141)."
15.  WEIGHT AND BALANCE - N/A.
16.  POINTS OF CONTACT -
     A.  TECHNICAL POINT OF CONTACT FOR THIS MESSAGE IS MR. STEVE 
PROSISE, AMSAM-RD-AE-I-P-C, DSN 897-3377 OR (256) 313-3377, FAX 
IS DSN 897-4348 OR (256) 313-4348.  EMAIL IS 
"STEVE.PROSISE@REDSTONE.ARMY.MIL".
     B.  LOGISTICAL POC IS MR. BILL OLSON, SFAE-AV-CH-L, DSN 897-
3379 OR (256) 313-3379, FAX IS EXT 4348.  EMAIL IS 
"WILLIAM.OLSON@PEOAVN.REDSTONE.ARMY.MIL".
     C.  WHOLESALE MATERIEL POC (SPARES) IS MIGUEL RODRIGUEZ, 
AMSAM-MMC-AV-CA, DSN 897-1508 OR (256) 313-1508, FAX IS DSN 897-
1106.  EMAIL IS "MIGUEL.RODRIGUEZ@REDSTONE.ARMY.MIL".
     D.  FORMS AND RECORDS POC FOR THIS MESSAGE IS MS. ANN 
WALDECK, AMSAM-MMC-MA-NM DSN 746-5564 OR (256) 876-5564, FAX IS 
DSN 746-4904.  EMAIL IS ANN.WALDECK@REDSTONE.ARMY.MIL".
     E.  SAFETY POINTS OF CONTACT ARE -
         (1)  PRIMARY - MR. HARRY TRUMBULL (SAIC), AMSAM-SF-A, 
DSN 897-2095 OR (256) 313-2095, FAX IS DSN 895-2111 OR (256) 313-
2111.  EMAIL IS "HARRY.TRUMBULL@REDSTONE.ARMY.MIL".
         (2)  ALTERNATE - MR. RUSS PEUSCH, AMSAM-SF-A, DSN 788-
8632 OR (256) 842-8632, FAX IS DSN 897-2111 OR (256) 313-2111.  
EMAIL IS "RUSSELL.PEUSCH@REDSTONE.ARMY.MIL".
     F.  FOREIGN MILITARY SALES RECIPIENTS REQUIRING 
CLARIFICATION OF ACTION ADVISED BY THIS MESSAGE SHOULD CONTACT -
         (1)  PRIMARY - MR. RONNIE W. SAMMONS, AMSAM-SA-CS-NF, 
DSN 897-6856 OR (256) 313-6856.  DATAFAX IS DSN 897-6630 OR (256) 
313-6630.  EMAIL IS "RONNIE.SAMMONS@REDSTONE.ARMY.MIL".
         (2)  ALTERNATE - MR. PAUL W. TARR, AMSAM-SA-CS-NF, DSN 
897-6861 OR (256) 313-6861.  DATAFAX IS DSN 897-6630 OR (256) 
313-6630.  EMAIL IS E-MAIL "TARRPW@REDSTONE.ARMY.MIL".
     G.  AFTER HOURS CONTACT THE AMCOM COMMAND OPERATIONS CENTER 
(COC) DSN 897-2066/7 OR (256) 313-2066/7.