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01 13 161231Z JUL 98 PP PP UUUU AA ZYUW
FROM
:CDRAMCOM REDSTONE ARSENAL AL//AMSAM-SF-A//
TO
:AIG 8881
TEXT
:UNCLAS
SUBJECT - SAFETY-OF-FLIGHT (SOF) MESSAGE, TECHNICAL, RCS
CSGLD-1860(R1), ALL H-47 SERIES AIRCRAFT, FLIGHT RESTRICTIONS FOR
AIRCRAFT WITH MWO 1-1520-240-50-67, NON- METALLIC SPLINE ADAPTERS
FOR COMBINING TRANSMISSION COOLING FAN DRIVE SHAFT APPLIED,
CH-47-98-02, (TB 1-1520-240-20-105)
NOTE - THIS IS A SAFETY OF FLIGHT MESSAGE ISSUED IAW AR 95-1,
CHAPTER 6, 1 SEP 97. 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 TRANSMISSION
TO CDR, AMCOM, ATTN: AMSAM-SF-A (SOF COMPLIANCE OFFICER).
1. PRIORITY CLASSIFICATION -
NOTE
SEE AR 95-1 PARA 6-6A, FOR EXCEPTION AUTHORITY OF
MAJOR COMMANDERS.
A. AIRCRAFT IN USE - UPON RECEIPT OF THIS MESSAGE CHANGE THE
CONDITION STATUS SYMBOL OF THE CITED AIRCRAFT WITH MWO
1-1520-240-50-67, TRANSMISSION PART NUMBER 145D5300-16, TO A CIRCLED
RED //X//. ENTRY SHALL STATE "AIRCRAFT RESTRICTED TO FLIGHT
RESTRICTIONS AND MAINTENANCE INSPECTIONS IAW SOF MESSAGE
CH-47-98-02". ADDITIONALLY, ENTER A RED DASH(-) STATUS SYMBOL AND
ENTRY SHALL STATE INITIAL COMPLIANCE "AFT COMBINING TRANSMISSION
COOLING FAN SPLINE INSPECTION IAW SOF MESSAGE CH-47-98-02 COMPLETED".
INSPECT THE AIRCRAFT PRIOR TO THE NEXT FLIGHT. CHANGE THE STATUS
SYMBOL FOR THE AIRCRAFT NOT INSPECTED WITHIN THE TIMEFRAME TO A RED
//X//. REPORT THE AIRCRAFT ON CIRCLE RED //X// CONDITION AS FULLY
MISSION CAPABLE (FMC).
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 - SAME AS PARA 1A.
(2) FERRY STATUS - SAME AS PARA 1A.
E. MAINTENANCE TRAINERS (CATEGORY A AND B) - N/A.
F. COMPONENT/PARTS IN STOCK AT ALL LEVELS (DEPOT AND OTHERS)
INCLUDING WAR RESERVES - N/A.
(1) WHOLESALE STOCK - N/A.
(2) RETAIL STOCK - N/A.
G. COMPONENTS/PARTS IN WORK (ALL LEVELS) - N/A.
2. TASK/INSPECTION SUSPENSE DATE - PRIOR TO NEXT FLIGHT.
3. REPORTING COMPLIANCE SUSPENSE DATE - NO LATER THAN 5 AUG 98 IAW
PARA 14A OF THIS MESSAGE.
4. SUMMARY OF PROBLEM -
A. RECENTLY, THREE CHINOOK COMBINING TRANSMISSION COOLING FAN
DRIVE SHAFTS HAVE SHEARED. ALL THREE OF THESE SHAFTS WERE THE NEW
COMBINING TRANSMISSION COOLING FAN SHAFTS (P/N 145D5319-7) WHICH
WERE INSTALLED AS PART OF MWO 1-1520-240-50-67. FAILURE OF THESE
SHAFTS WAS CONTAINED BY THE "STOVE PIPE" RETAINING SHIELD, THEREFORE
ELIMINATING ANY COLLATERAL DAMAGE. BUT SINCE THE COOLING FAN WAS NO
LONGER OPERATING, THE TEMPERATURE OF THE COMBINING TRANSMISSION AND
BOTH ENGINE TRANSMISSIONS EXCEEDED 140 DEGREE CENTIGRADE. THIS HIGH
TEMPERATURE CONDITION REQUIRED LANDING OF THE AIRCRAFT AS SOON AS
POSSIBLE WITHOUT DELAY AND REPLACEMENT OF ALL TRANSMISSIONS WHICH
EXCEEDED THE 140 DEGREE CENTIGRADE TEMPERATURE LIMIT. CURRENTLY
THERE IS AN ONGOING INVESTIGATION AS TO THE CAUSE OF THE THREE FAN
SHAFT FAILURES.
B. MANPOWER/DOWNTIME AND FUNDING IMPACTS - N/A.
C. THE PURPOSE OF THIS MESSAGE IS TO IMPLEMENT FLIGHT
RESTRICTIONS, ADDITIONAL PREFLIGHT INSPECTION PROCEDURES, AND A
RECURRING INSPECTION EVERY FOUR FLIGHT HOURS OF THE COMBINING
TRANSMISSION COOLING FAN DRIVE SHAFT FOR ALL CHINOOK AIRCRAFT WHICH
HAVE MWO 1-1520-240-50-67 APPLIED. THE FLIGHT RESTRICTIONS AND
INSPECTIONS WILL CONTINUE UNTIL THE CAUSE OF THE COMBINING
TRANSMISSION COOLING FAN DRIVE SHAFT FAILURES HAVE BEEN DETERMINED
AND CORRECTIVE ACTIONS HAVE BEEN IMPLEMENTED.
5. END ITEMS TO BE INSPECTED - ALL CH-47D, MH47D, AND MH-47E
AIRCRAFT WHICH HAVE MWO 1-1520-240-50-67 APPLIED.
MWO 1-1520-240-50-67 IS TITLED NON-METALLIC SPLINE ADAPTERS FOR
COMBINING TRANSMISSION COOLING FAN DRIVE SHAFT.
6. ASSEMBLY COMPONENTS TO BE INSPECTED -
NOMENCLATURE PART NUMBER NSN
COMBINING TRANSMISSION 145D5300-16 1615-01-397-9921
COMBINING TRANSMISSION 145D5300-17
7. PARTS TO BE INSPECTED -
NOMENCLATURE PART NUMBER NSN
COOLING FAN DRIVE SHAFT 145D5319-7 3040-01-412-9558
SPLINED ADAPTER 145DS524-1 3040-01-411-4869
8. INSPECTION PROCEDURES - PRIOR TO EACH FLIGHT, THE FLIGHT CREW
WILL INSPECT THE COMBINING TRANSMISSION COOLING FAN DRIVE SHAFT FOR
AXIAL (UP AND DOWN) MOVEMENT. AS PART OF THE PMD AND AT EVERY
FOURTH FLIGHT HOUR, THE COMBINING TRANSMISSION COOLING FAN DRIVE
SHAFT WILL BE INSPECTED FOR AXIAL (UP AND DOWN) MOVEMENT.
WARNING
THE TRANSMISSION AND FAN DRIVE SHAFT COULD
BE EXTREMELY HOT FOLLOWING ENGINE RUNS OR
AFTER FLIGHT.
A. INSERT FINGERS THROUGH THE HOLES IN THE "STOVE PIPE"
RETAINING SHIELD AND CHECK TO SEE THAT THE SHAFT CAN MOVE FREELY UP
AND DOWN. AXIAL MOVEMENT SHOULD BE APPROXIMATELY ONE-FOURTH (1/4)
INCH.
B. ANNOTATE THE REQUIREMENT FOR AND THE RESULTS OF THE
RECURRING FOUR HOUR INSPECTION ON THE DA FORM 2408-13-1.
9. CORRECTION PROCEDURES -
A. IF THE COMBINING TRANSMISSION COOLING FAN DRIVE SHAFT CANNOT
BE FREELY MOVED, THEN THE FAN SHAFT SHALL BE REMOVED IAW TM
55-1520-240-23, TASK NUMBER 6-182 (FOR MH-47E USE TM 1-1520-252-23,
TASK NUMBER 6-220) AND THE NON-METALLIC SPLINED ADAPTER AT THE
COMBINING TRANSMISSION INSPECTED. INSPECT AS FOLLOWS:
(1) ENSURE THE UPPER AND LOWER ADAPTER SPLINES ARE SEATED.
SOME SPLINES HAVE BEEN FOUND NOT SEATED THEREBY RESTRICTING THE UP
AND DOWN MOVEMENT OF THE SHAFT. RESEAT ADAPTER THEN CONTINUE WITH
INSPECTION.
(2) VISUALLY INSPECT THE ADAPTER SPLINES FOR CRACKS,
BREAKS, AND ANY ABNORMALITIES. USE A BORESCOPE IF AVAILABLE.
(3) VISUALLY INSPECT THE DRIVE SHAFT FOR WEAR, CRACKS OR
ANY ABNORMAL SIGNS.
(4) CONTACT THE TECHNICAL AND LOGISTICAL POC LISTED IN
PARA 16 IF ANY OF THE ABOVE CONDITIONS ARE FOUND.
(5) SUBMIT A QDR IAW ESTABLISHED PROCEDURES IMMEDIATELY.
B. ALL AIRCRAFT WITH MWO 1-1520-240-50-67 APPLIED ARE SUBJECT
TO THE FOLLOWING RESTRICTIONS:
(1) CONDUCT THE PARAGRAPH 8 INSPECTION PRIOR TO EACH FLIGHT.
(2) FLIGHTS ARE RESTRICTED TO 4 FLIGHT HOURS BETWEEN
INSPECTIONS.
(3) MISSIONS ARE RESTRICTED TO VMC ONLY, NO INTENTIONAL
FLIGHT INTO IMC.
(4) NIGHT AIDED AND NIGHT UNAIDED MISSIONS ARE AUTHORIZED.
(5) NO OPERATIONS IN AREAS WHERE "LAND AS SOON AS
POSSIBLE" COULD NOT BE ACCOMPLISHED (EXTENSIVE SWAMPS, FORESTS, ETC).
(6) MAXIMUM FLIGHT ALTITUDE IS 2000 FT AGL.
NOTE
MAINTENANCE TEST FLIGHT PROCEDURES ARE
AUTHORIZED ABOVE 2000 FT AGL.
(7) IF ANY XMSN OIL HOT CAUTION CAPSULE ILLUMINATES, LAND
THE AIRCRAFT AS SOON AS POSSIBLE.
(8) NO FLIGHTS OVER WATER WHEN ANOTHER LAND ROUTE IS
AVAILABLE, EVEN IF THE LAND ROUTE IS LONGER IN DISTANCE.
WARNING
OVER WATER FLIGHTS ARE CONSIDERED HIGH
RISK MISSIONS.
(9) A COPY OF THIS MESSAGE WILL BE POSTED IN THE LOGBOOK OF
EACH AFFECTED AIRCRAFT.
C. IF A PRELIMINARY FAULT SUCH AS A COMBINING TRANSMISSION CHIP
LIGHT OR LATCH IS TRIPPED, A 50 HOUR VIBRATION CHECK OF THE
COMBINING TRANSMISSION FAN SHAFT SHALL BE ACCOMPLISHED. THE
COMBINING TRANSMISSION FAN SHAFT AND THE SPLINED ADAPTERS SHALL BE
INSPECTED FOR SERVICEABILITY. IF THE FAN SHAFT IS ABOVE 0.3 IPS OR
HAS INCREASED BY 0.15 IPS AS COMPARED TO THE PREVIOUS READING,
CONTACT THE TECHNICAL POC IN PARAGRAPH 16A.
10. SUPPLY/PARTS AND DISPOSITION -
A. PARTS REQUIRED - N/A.
B. REQUISITIONING INSTRUCTIONS - N/A.
C. BULK AND CONSUMABLE MATERIALS - N/A.
D. DISPOSITION - N/A.
E. DISPOSITION OF HAZARDOUS MATERIAL - N/A.
11. SPECIAL TOOLS AND FIXTURES REQUIRED - N/A.
12. APPLICATION -
A. CATEGORY OF MAINTENANCE - N/A.
B. ESTIMATED TIME REQUIRED - N/A.
C. ESTIMATED COST IMPACT TO THE FIELD - N/A.
D. TB/MWOS TO BE APPLIED PRIOR TO OR CONCURRENTLY WITH THIS
INSPECTION - N/A.
E. PUBLICATIONS WHICH REQUIRE CHANGE - N/A.
13. REFERENCES -
A. TM 55-1520-240-23, 10 MAY 83.
B. TM 1-1520-252-23, 28 JUN 95.
14. RECORDING AND REPORTING REQUIREMENTS -
A. REPORTING COMPLIANCE SUSPENSE DATE (AIRCRAFT) - IAW AR 95-1
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 CDR AMCOM, ATTN: AMSAM-SF-A (SOF COMPLIANCE OFFICER).
DATAFAX NUMBER IS DSN 897-2111 OR (256) 313-2111. E-MAIL ADDRESS IS
"SAFEADM@REDSTONE.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. TASK/INSPECTION REPORTING SUSPENSE DATE (AIRCRAFT) - N/A.
C. REPORTING MESSAGE RECEIPT (SPARES) - N/A.
D. TASK/INSPECTION REPORTING SUSPENSE DATE (SPARES) - N/A.
E. THE FOLLOWING FORMS ARE APPLICABLE AND ARE TO BE COMPLETED
IN ACCORDANCE WITH DA PAM 738-751, 15 JUN 92 -
NOTE
ULLS-A USERS WILL USE APPLICABLE "E" FORMS.
(1) DA FORM 2408-5-1, EQUIPMENT MODIFICATION RECORD
(TRANSMISSION).
(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.
(5) DA FORM 2408-16, AIRCRAFT COMPONENT HISTORICAL RECORD
(ONLY IF TRANSMISSION IS REPLACED)
(6) DA FORM 2410, COMPONENT REMOVAL AND REPAIR/OVERHAUL
RECORD (ONLY IF TRANSMISSION AND/OR COOLING FAN DRIVE SHAFT IS
REPLACED).
15. WEIGHT AND BALANCE - N/A.
16. POINTS OF CONTACT -
A. TECHNICAL POINT OF CONTACT FOR THIS MESSAGE IS MR. MATT
WESSELSCHMIDT, AMSAM-AR-E-I-C-H, DSN 897-4286 OR (256) 313-4286,
DATAFAX IS (256) 313-4348.
E-MAIL IS "WESSELSCHMIDT-ML@AVRDECR.REDSTONE.ARMY.MIL".
B. LOGISTICAL POINT OF CONTACT FOR THIS MESSAGE IS MR. NORM
HUSTON, SFAE-AV-CH-L, DSN 897-4289 OR (256) 313-4289, DATAFAX IS
(256) 313-4348. E-MAIL IS "HUSTONN@PEOAVN.REDSTONE.ARMY.MIL".
C. FORMS AND RECORDS POINT OF CONTACT FOR THIS MESSAGE
IS MS. ANN WALDECK, AMSAM-MMC-RE-FF DSN 746-5564 OR (256) 876-5564,
DATAFAX IS DSN 746-4904. E-MAIL IS "WALDECK-AB@REDSTONE.ARMY.MIL".
D. SAFETY POINT OF CONTACT FOR THIS MESSAGE IS MR. TENG OOI,
AMSAM-SF-A, DSN 897-2094 OR (256) 313-2094, E-MAIL IS
"OOI-TK@REDSTONE.ARMY.MIL". THE ALTERNATE SAFETY POC IS MR. HOWARD
CHILTON, AMSAM-SF-A, DSN 746-7271 OR (256) 876-7271, E-MAIL IS
"CHILTON-HL@REDSTONE.ARMY.MIL." DATAFAX IS DSN 897-2111 OR
(256) 313-2111
E. FOREIGN MILITARY SALES RECIPIENTS REQUIRING CLARIFICATION
OF ACTION ADVISED BY THIS MESSAGE SHOULD CONTACT: CW5 JOSEPH L.
WITTSTROM, SECURITY ASSISTANCE MANAGEMENT, AMSAM-SA, DSN 897-0681 OR
(256) 313-0681. EMAIL IS "WITTSTROM-JL@REDSTONE.ARMY.MIL" OR MR.
RONNIE W. SAMMONS, AMSAM-SA-CS-NF, DSN 897-0869 OR (256) 313-0869.
DATAFAX IS DSN 897-0411 OR (256) 313-0411.
EMAIL IS "SAMMONS-RW @REDSTONE.ARMY.MIL". HUNTSVILLE, AL IS GMT
MINUS 6 HRS.
F. AFTER HOURS CONTACT THE AMCOM COMMAND OPERATIONS CENTER
(COC) DSN 897-2066/7 OR (256) 313-2066/7.
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