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:CDRATCOM ST LOUIS MO//AMSAT-R-X//
TO
:AIG 6713
:AIG 9004
:AIG 8708
:AIG 9042
:AIG 7471
:AIG 12124
:USMILGP BUENOS AIRES AR//ARMY AND AF SEC//
:DEFAIR MATERIAL CANBERRA AS//DAAP-AF//
:ARMYLMSQN OAKEY AS
:AVN REGT HQ SQN OAKEY AS//DAVN-A//
:CDRUSARDSG CANBERRA AS
:LOGCON OTTAWA CAN//DTHEM 6-2//
:ARGENTINE AIR ATTACHE FMS WASHINGTON DC
:EGYPT AF FMS CAIRO EG//ED-MA//
:USOMC CAIRO EG//AV//
:ODC ATHENS GR//ODCSA//
:CDR4THBN228THAVN SOTO CANO HO//AVN-AMO//
:102DARMY SCOTT AFB IL//AFRC-AMO-ASF-IL//
:CHJUSMAG SEOUL KOR//MKAR//
:ROK ARMY FMS PUSAN KOR//ALC-LSD-L//
:CDR160TH SOAR FT CAMPBELL KY//AOAV-SI//
:CDRBGAD RICHMOND KY//SDSBG-GC//
:USDAO RABAT MO//AF//
:CHUSAS RIYADH SA//ASAV//
:ODC MADRID SP//ASM//
:SPAIN ARMY FMS MADRID SP
:AIT TAIPEI TW
:TAIWAN ARMY FMS TAIPEI TW
:CJUSMAG THAI BANGKOK TH//MAGTAR-FS//
:ROYAL THAI ARMY FMS/DUSIT ORDNANCE DEP BANGKOK TH
:CDRUSARDSG LONDON UK//AMXSN-UK-SE//
:ODC LONDON UK
INFO
:CDRAMC ALEXANDRIA VA//AMCMR/AMCCS/AMCSM-WAA//
XMT
:USDAO DHAKA BG
:USDAO RANGOON BM
:USCINCPAC REP PHNOM PENH CB
:USDAO COLOMBO CE
:USDAO SUVA FJ
:OMADP JAKARTA ID
:DSA NEW DELHI IN
:AMEMBASSY ANTANANARIVO MA
:AMEMBASSY PORT LOUIS
:SAO KUALA LUMPUR MY
:AMEMBASSY KATHMANDU NP//POL-MIL//
:AMEMBASSY VICTORIA
:SAO SINGAPORE SN
ACCT
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TEXT
:UNCLAS
SUBJECT - AVIATION SAFETY ACTION MESSAGE, MAINTENANCE
MANDATORY, RCS CSGLD-1860(R1), ALL CH-47D, MH-47D, AND MH-
47E AIRCRAFT, INSPECTION OF THE AFT VERTICAL SHAFT (CH-47-95-
ASAM-08) (TB 1-1520-240-20-78)
NOTE - THIS IS AN AVIATION SAFETY ACTION MESSAGE ISSUED PER
AR 95-3, CHAPTER 5 REVISION VIA MESSAGE HQ AVSCOM, AMSAV-
XSOF, 181900Z SEP 90, SUBJECT: CHANGE TO AR 95-3, CHAPTER
5, SAFETY OF FLIGHT MESSAGES. 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 ADDRESSES WILL IMMEDIATELY VERIFY THIS RETRANSMISSION
TO COMMANDER, ATCOM, ATTN - AMSAT-R-X (SOF COMPLIANCE
OFFICER).
1. PRIORITY CLASSIFICATION -
A. AIRCRAFT IN USE - UPON RECEIPT OF THIS MESSAGE THE
CONDITION STATUS SYMBOL OF THE CITED AIRCRAFT WILL BE
CHANGED TO A RED HORIZONTAL DASH //-//. THE RED HORIZONTAL
DASH //-// MAY BE CLEARED WHEN THE INSPECTION OF PARA 8
BELOW IS COMPLETED. THE AFFECTED AIRCRAFT SHALL BE
INSPECTED AS SOON AS PRACTICAL BUT NO LATER THAN THE
TASK/INSPECTION SUSPENSE DATE. FAILURE TO COMPLY WITH THE
REQUIREMENTS OF THIS MESSAGE WITHIN THE TIME FRAME WILL
CAUSE THE STATUS SYMBOL TO BE UPGRADED TO A RED //X//.
B. AIRCRAFT IN DEPOT MAINTENANCE - SAME AS PARA 1A.
C. AIRCRAFT UNDERGOING MAINTENANCE - SAME AS PARA 1A.
D. AIRCRAFT IN TRANSIT -
(1) SURFACE/AIR SHIPMENT - WITHIN 50 HOURS.
(2) FERRY STATUS -
(A) SAME AS PARA 1A.
(B) THOSE AIRCRAFT THAT HAVE A DD250 AND ARE AT
BOEING HELICOPTER COMPANY WILL BE INSPECTED PRIOR TO FERRY
TO FINAL DESTINATION.
E. MAINTENANCE TRAINERS (CATEGORY A, B) - SAME AS PARA
1A.
F. COMPONENT/PARTS IN STOCK INCLUDING WAR RESERVES AT
ALL LEVELS (DEPOT AND OTHERS) - N/A.
2. TASK/INSPECTION SUSPENSE DATE - 50 FLIGHT HOURS.
3. REPORTING COMPLIANCE SUSPENSE DATE - NO LATER THAN 4
OCT 95 PER PARA 14A OF THIS MESSAGE.
4. SUMMARY OF PROBLEM -
A. THE 101ST AIRBORNE DIVISION REPORTED MULTIPLE
AIRCRAFT THAT HAD RUBBING DAMAGE TO THE AFT VERTICAL SHAFTS
ON THE SURFACE THAT IS ADJACENT TO THE DUST SEAL ON THE TOP
OF THE SLIDER SHAFT.
B. FOR MANPOWER/DOWNTIME AND FUNDING IMPACTS SEE PARA
12.
C. THE PURPOSE OF THIS MESSAGE IS TO VISUALLY INSPECT
THE AFT VERTICAL SHAFT AT THE TOP OF THE SLIDER SHAFT FOR
WEAR ADJACENT TO THE DUST SEAL ON THE SHAFT AND INSPECT FOR
PROPER CLEARANCE FOR THE DUST SEALS. IN ADDITION, A
RECURRING VISUAL INSPECTION WILL BE REQUIRED AT EACH PHASE.
5. END ITEMS TO BE INSPECTED - ALL CH-47D, MH-47D, AND MH-
47E AIRCRAFT.
6. ASSEMBLY COMPONENTS TO BE INSPECTED -
NOMENCLATURE PART NO. NSN
SHAFT ASSEMBLY 145D3300-6 1680-01-320-1191
7. PARTS TO BE INSPECTED -
NOMENCLATURE PART NO. NSN
SHAFT, UPPER 145D3303-2
SEAL, SHAFT 145R3131-1 1615-01-113-0258
SEAL, SHAFT 145R3131-2 1615-01-113-0261
8. INSPECTION PROCEDURES -
NOTE
DISASSEMBLY IS NOT REQUIRED FOR VISUAL INSPECTION.
A. FOR ROTOR SHAFTS THAT ARE INSTALLED ON THE AIRCRAFT.
GAIN ACCESS TO THE AFT ROTOR SHAFT (TM 55-1520-240-23P,
FIGURE 199, ITEM 247, OR TM 1-1520-252-23P, FIG 623, ITEM
6). WITH THE UTILIZATION OF A FLASHLIGHT AND INSPECTION
MIRROR, INSPECT THE SURFACE OF THE ROTOR SHAFT UNDER THE
DUST SEAL AT THE TOP OF THE SLIDER SHAFT ASSEMBLY FOR
INDICATION OF RUBBING DAMAGE. IF THERE IS NO EVIDENCE OF
RUBBING, ENSURE THE DUST SHIELD HAS PROPER CLEARANCE AND IS
IN SERVICEABLE CONDITION PER PARAGRAPH 9.C. IF THERE IS
EVIDENCE OF RUBBING THROUGH THE TOP COAT (GRAY COLOR),
PROCEED TO PARAGRAPH 9.
B. FOR ROTOR SHAFTS THAT ARE NOT INSTALLED, THE
LOCATION OF THE DUST SEAL IS APPROXIMATELY 24 INCHES ABOVE
THE THRUST BEARING, CHECK FOR INDICATION OF RUBBING. IF
THERE IS NO EVIDENCE OF RUBBING, THE INSPECTION OF THE SHAFT
IS COMPLETE. IF THERE IS EVIDENCE OF RUBBING THROUGH THE
TOP COAT (GRAY COLOR), PROCEED TO PARAGRAPH 9.
C. THE VISUAL INSPECTION TO INSPECT THE ROTOR SHAFT FOR
RUBBING AND TO INSPECT THE DUST COVER FOR PROPER CLEARANCE
WILL BE ACCOMPLISHED AT EACH PHASE.
9. CORRECTION PROCEDURES -
A. IF THE DAMAGE IS THROUGH THE PRIMER AND INTO THE
BASE METAL, REMOVE ROTOR HEAD, RAIN SHIELD, SWASHPLATE, AND
SLIDER SHAFT (TM 55-1520-240-23, CHAPTER 6, AND FOR CH-47E
TM 1-1520-252-23M CHAPTER 6). CLEAN THE AREA. INSPECT THE
WEAR AREA WITH A 5X MAGNIFYING GLASS FOR EVIDENCE OF A SHOT
PEENED SURFACE. A SHOT PEENED SURFACE HAS A DIMPLED
APPEARANCE. IF THE CONDITION OF THE SURFACE CANNOT BE
DETERMINED USING A 5X GLASS, TRY A 10X GLASS. IF THE
CONDITION CANNOT BE DETERMINED USING THE 10X, CONTACT THE
TECHNICAL POINT OF CONTACT. IF A SHOT PEENED SURFACE IS
DETECTED, TOUCH UP THE SURFACE WITH PRIMER AND TOP COAT
(BRUSH OR SPRAY) IAW LOCAL PROCEDURES AND REASSEMBLE.
B. IF THE DAMAGE IS JUST INTO THE PRIMER OR TOP COAT,
REINSPECT THE SHAFT EVERY 50 FLIGHT HOURS TO ENSURE THE
RUBBING DOES NOT PROGRESS INTO THE METAL. AT NEXT PHASE
INSPECTION, DISASSEMBLE AND TOUCH UP THE PRIMER AND TOP COAT
(BRUSH OR SPRAY) IN ACCORDANCE WITH LOCAL PROCEDURES AND
REASSEMBLE.
C. FOR ALL AIRCRAFT, ENSURE THAT A MINIMUM CLEARANCE
EXISTS OF 0.050 INCH BETWEEN THE RUBBER SEAL AND THE SURFACE
OF THE ROTOR SHAFT. IF A MINIMUM CLEARANCE DOES NOT EXIST
BETWEEN THE SHAFT AND SEAL, INSPECT THE SEAL FOR
DETERIORATION AND DAMAGE. REPLACE THE SEAL IF NECESSARY
(CHAPTER 6). IF THE SEAL IS IN SERVICEABLE CONDITION AND
CLEARANCE IS STILL BELOW 0.050, LOOSEN ALL OF THE BOLTS
HOLDING THE SEAL ASSEMBLY TO THE SLIDER SHAFT. MOVE THE
SEAL AND PLATE RADIALLY AS FAR AWAY FROM THE SHAFT AS
POSSIBLE, THEN RETORQUE THE BOLTS (CHAPTER 6). IF A MINIMUM
CLEARANCE OF 0.050 CANNOT BE ATTAINED, CONTACT THE TECHNICAL
POINT FOR INSTRUCTIONS.
10. SUPPLY/PARTS AND DISPOSITION -
A. PARTS REQUIRED - ITEMS CITED IN PARAS 6 AND 7 MAY
BE REQUIRED TO REPLACE DEFECTIVE ITEMS.
B. REQUISITIONING INSTRUCTIONS -
REQUISITION REPLACEMENT PARTS THROUGH NORMAL SUPPLY CHANNELS
USING NORMAL SUPPLY PROCEDURES. ALL REQUISITIONS SHALL USE
PROJECT CODE "XBH" PER THIS MESSAGE.
NOTE
PROJECT CODE "XBH" IS REQUIRED TO TRACK AND ESTABLISH A DATA
BASE OF STOCK FUND EXPENDITURES INCURRED BY THE FIELD AS A
RESULT OF ASAM/SOF ACTIONS.
C. BULK AND CONSUMABLE MATERIALS -
NOMENCLATURE PART NUMBER NSN
ZINC CHROMATE PRIMER MIL-P-6808 8010-00-835-2114
EPOXY PRIMER MIL-P-23377 8010-00-082-2450
COATING, POLYURETHANE MIL-C-46168 8010-01-127-8908
COATING, EPOXY MIL-C-22750 8010-01-350-2071
(COLOR #16081, ENGINE GRAY)
D. DISPOSITION -
DISPOSE OF REMOVED PARTS/COMPONENTS IN ACCORDANCE WITH
NORMAL SUPPLY PROCEDURES. A QDR IS REQUIRED FOR INFORMATION
AT REPLACEMENT OF SEALS ONLY.
E. DISPOSITION OF HAZARDOUS MATERIAL - IN ACCORDANCE
WITH ENVIRONMENTAL PROTECTIVE AGENCY DIRECTIVES AS
IMPLEMENTED BY YOUR SERVICING ENVIRONMENTAL COORDINATOR (AR
200-1).
11. SPECIAL TOOLS, JIGS AND FIXTURES REQUIRED - N/A.
12. APPLICATION -
A. CATEGORY OF MAINTENANCE - AVUM AIRCRAFT DOWNTIME
WILL BE CHARGED TO AVUM MAINTENANCE.
B. ESTIMATED TIME REQUIRED FOR INSPECTION -
(1) TOTAL OF 2 MANHOURS USING 1 PERSONS.
(2) TOTAL OF 2 HOURS DOWNTIME FOR ONE END ITEM.
C. ESTIMATED COST IMPACT OF STOCK FUND ITEMS TO THE
FIELD -
NOMENCLATURE PART NO. NSN COST EA.
SEAL, SHAFT 145R3131-1 1615-01-113-0258 249.01
SEAL, SHAFT 145R3131-2 1615-01-113-0261 266.51
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 - TM 55-1520-240-PM AND TM 1-1520-252-PM
SHALL BE CHANGED TO ADD THE SHAFT INSPECTION AND SEAL
ADJUSTMENT.
13. REFERENCES -
A. TM 55-1520-240-23P
B. TM 55-1520-240-23-5
C. TM 1-1520-252-23
D. TM 1-1520-252-23P
E. TM 55-1520-240-PM
F. TM 1-1520-252-PM
14. RECORDING AND REPORTING REQUIREMENTS -
A. REPORTING COMPLIANCE SUSPENSE DATE (AIRCRAFT) -
UPON ENTERING REQUIREMENTS OF THIS MESSAGE ON DA FORM 2408-
13-1 ON ALL SUBJECT MDS AIRCRAFT, FORWARD A PRIORITY
MESSAGE, DATAFAX OR E-MAIL TO COMMANDER, ATCOM, ATTN: AMSAT-
R-X (SOF COMPLIANCE OFFICER), PER AR 95-3. DATAFAX NUMBER
IS DSN 693-2064 OR COMMERCIAL 314/263-2064. E-MAIL ADDRESS
IS "AMSATRXS (AT SIGN) ST-LOUIS-EMH4.ARMY.MIL". THE REPORT
WILL CITE THIS MESSAGE NUMBER, DATE OF ENTRY IN DA FORM 2408-
13-1, THE AIRCRAFT MISSION DESIGN SERIES AND SERIAL NUMBERS
OF AIRCRAFT IN NUMERICAL ORDER.
B. THE FOLLOWING FORMS ARE APPLICABLE AND ARE TO BE
COMPLETED IN ACCORDANCE WITH DA PAM 738-751, 15 JUN 92 -
(1) DA FORM 2408-13, AIRCRAFT STATUS INFORMATION
RECORD.
(2) DA FORM 2408-13-1, AIRCRAFT INSPECTION AND
MAINTENANCE RECORD.
(3) DA FORM 2408-15, HISTORICAL RECORD FOR
AIRCRAFT.
(4) DA FORM 2408-16, AIRCRAFT COMPONENT
HISTORICAL RECORD.
(5) DA FORM 2408-18, EQUIPMENT INSPECTION LIST.
(6) DA FORM 2410, COMPONENT REMOVAL AND
REPAIR/OVERHAUL RECORD FOR SHAFT REPLACEMENT.
15. WEIGHT AND BALANCE - N/A.
16. POINTS OF CONTACT -
A. TECHNICAL POINTS OF CONTACT FOR THIS MESSAGE ARE
MR. DAVID BRAUN, CONTRACTOR, AND MR. MIKE WRIGHT, AMSAT-R-
ECC, DSN 693-6679/-3550 OR COMMERCIAL 314/263-6679/-3550,
RESPECTIVELY.
B. LOGISTICAL POINT OF CONTACT FOR THIS MESSAGE IS MR.
NORM HUSTON, SFAE-AV-CH-L, DSN 693-1415 OR COMMERCIAL
314/263-1415.
C. FORMS AND RECORDS POINT OF CONTACT FOR THIS MESSAGE
IS MS. ANN WALDECK, AMSAT-I-MDM, DSN 693-1821/1758 OR
COMMERCIAL 314/263-1821/1758.
D. SAFETY POINT OF CONTACT FOR THIS MESSAGE IS MR.
LYELL MYERS, AMSAT-R-X, DSN 693-2438 OR COMMERCIAL 314/263-
2438.
E. FOREIGN MILITARY SALES (FMS) RECIPIENTS REQUIRING
CLARIFICATION OF ACTION ADVISED BY THIS MESSAGE SHOULD
CONTACT CW5 JAY NANCE/MR. RON VAN REES, AMSAT-I-IAF, DSN 693-
3826/3659 OR COMMERCIAL 314/263-3826/3659.
F. AFTER HOURS CONTACT ATCOM COMMAND OPERATIONS CENTER
(COC) DSN 693-2066/7 OR COMMERCIAL 314./263-2066/7.