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SYNOPSIS
CH-47-91-02 SAFETY OF FLIGHT MESSAGE, TECHNICAL, CH-47D, MH-47D AND
MH-47E AIRCRAFT, UPDATE TO CH-47-91-01 TO IDENTIFY
SERVICEABLE COMBINER TRANSMISSIONS AND ENGINE TRANSMISSIONS
(TB 55-1520-240-20-55 WILL BEE REVISED).
151500Z MAY 91, BRAD MEYER, AMSAV-XSOF, X9089.
01 13 151500Z MAY 91 OO PP UUUU ZEXW 1351200Z
YES
CDRAVSCOM ST LOUIS MO //AMSAV-XSOF//
AIG 8881
AIG 9004
AIG 8708
AIG 9042
CDR 321ST //MMC-AV//
DCMDS ATLANTA MARIETTA GA //DMCDS-HPF//
CDR 4-228 AVN SOTO CANO //AVN-AMO//
102 ARMY AVIATION FACILITY SCOTT AFB IL
//AFKB-AC-CJ-ASF//
ARCENT SPT CMD //AMC-AVSCOM/G4-AVN//
DCMDN BOSTON MA //DCMDN-QS//
COMUSARCENT MAIN //AFRD-PA-S/G3-AVN/G4-AVN//
INFO DEFAIROCAS CANBERRA AS //ORHEL-AF//
DEFAIRENG CANBERRA AS //DAIRENG-AF//
DEFARM CANBERRA AS //DOHS-A//
DEFNAV CANBERRA AS
SRUSARSG CANBERRA AS
HQLCENG MELBOURNE AS //DAIRENG//
SFAE-AV-CH, AMSAV-ECC, AMSAV-I-RAAF, AMSAV-MEA, AMSAV-LRC
BRAD MEYER
AMSAV-XSOF, X9089
EDWARD J. HOLLMAN
CHIEF, SAFETY OFFICE
.
UNCLAS
02 13 151500Z MAY 91 OO PP UUUU ZEXW 1351200Z
YES
LOG CON OTTAWA CAN //DTHEM 6-3//
AUSTNAV WASHINGTON DC //DEFNAV//
AUSTRAIR WASHINGTON DC //SENGSO//
OMC CAIRO EGYPT //AV//
DQMSO ATLANTA MARIETTA GA //DQMSO-S//
ODC ATHENS GR //ODCSA-A//
CDR AMCCOM ROCK ISL IL //AMSAR-QAS-P//
CHMUSLO RABAT MO/AF
CHUSAS RIYADH SA //ASAV//
ODC MADRID SP //ARMY AND NAVY SEC//
CJUSMAG BANGKOK TH
CDRUSARDSG LONDON UK //AMXSN-UK-SE//
CDRAMC ALEXANDRIA VA //AMCMR/AMCCS/AMCSM-WAA//
XMT USDA0 DHAKA BG
USDAO RANGOON BM
USDAO COLOMBO CE
USCINCPAC REP SUVA FJ
USADAO JAKARTA ID //MADP//
AMEMBASSY NEW DELHI IN //DSA//
.
UNCLAS
03 13 151500Z MAY 91 OO PP UUUU ZEXW 1351200Z
YES
AMEMB PORT MORESBY PAPUA NEW GUINEA
USDAO KATMANDU NP
UNCLAS
AIG 9004 TAKE FOR INFO ONLY
AIG 8708 TAKE FOR INFO ONLY
AIG 9042 TAKE FOR INFO ONLY
SUBJECT - SAFETY-OF-FLIGHT MESSAGE, TECHNICAL, RCS CSGLD-1860(R1)
CH-47D, MH-47D AND MH-47E AIRCRAFT, UPDATE TO CH-47-91-01 TO
IDENTIFY SERVICEABLE COMBINER TRANSMISSIONS AND ENGINE TRANSMISSIONS
(CH-47-91-02) (TB 55-1520-240-20-55 WILL BE REVISED)
NOTE - THIS IS A SAFETY-OF-FLIGHT MESSAGE AND 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 THIS MESSAGE. ACTION ADDRESSEES WILL IMMEDIATELY
VERIFY THIS RETRANSMISSION TO COMMANDER, AVSCOM, ATTN -
AMSAV-XSOF(SOF COMPLIANCE OFFICER).
1. PRIORITY CLASSIFICATION -
A. AIRCRAFT IN USE - N/A.
.
UNCLAS
04 13 151500Z MAY 91 OO PP UUUU ZEXW 1351200Z
YES
B. AIRCRAFT IN DEPOT MAINTENANCE - N/A.
C. AIRCRAFT UNDERGOING MAINTENANCE - N/A.
D. AIRCRAFT IN TRANSIT -
(1) SURFACE/AIR SHIPMENT - N/A.
(2) FERRY STATUS - N/A.
E. MAINTENANCE TRAINERS (CATEGORY A, B AND C) - MAINTENANCE
TRAINERS SHOULD HAVE PERFORMED INSPECTION IAW SAFETY OF FLIGHT
MESSAGE CH-47-91-01.
F. COMPONENT/PARTS IN STOCK INCLUDING WAR RESERVES AT ALL
LEVELS (DEPOT AND OTHERS) - N/A.
2. TASK/INSPECTION SUSPENSE DATE - N/A.
3. REPORTING COMPLIANCE SUSPENCE DATE - N/A.
4. SUMMARY OF PROBLEM -
A. SAFETY 0F FLIGHT (SOF) MESSAGE CH-47-91-01 DIRECTED THAT
COMBINER TRANSMISSIONS AND ENGINE TRANSMISSIONS WITH SPECIFIED
SERIAL NUMBERS AND GEARS WITH A "P" (PAPA) PREFIX WERE
UNSERVICEABLE. ALL REQUIREMENTS OF SOF MESSAGE CH-47-91-01 REMAIN
VALID.
B. INSPECTION PROCEDURES HAVE NOW BEEN DEVELOPED TO INSPECT
.
UNCLAS
05 13 151500Z MAY 91 OO PP UUUU ZEXW 1351200Z
YES
GEARS IN THESE TRANSMISSIONS AT DEPOT LEVEL. GEARS THAT PASS
INSPECTION WILL HAVE A //DG//, //DGC// OR //DGS// AT THE END OF THE
GEAR SERIAL NUMBER. TRANSMISSION HISTORICAL RECORD WILL STATE THE
INSTALLED GEAR SERIAL NUMBER. ALL TRANSMISSIONS WITH A "M" (MIKE)
IN FRONT OF THE GEAR SERIAL NUMBER ARE CONSIDERED SERVICEABLE.
C. THE TRANSMISSION LIST IN SOF MESSAGE CH-47-91-01 IS NOW
UPDATED. SOME TRANSMISSIONS HAVE BEEN DELETED BECAUSE THEY ARE NOT
IN THE ARMY INVENTORY. SOME TRANSMISSIONS HAVE BEEN ADDED BECAUSE
UNITS HAVE REPORTED ADDITIONAL TRANSMISSIONS CONTAINING GEARS HAVING
A SERIAL NUMBER WITH A PREFIX "P" (PAPA) IAW SOF MESSAGE
CH-47-91-01.
D. THE PURPOSE OF THIS MESSAGE IS TO INFORM UNITS THAT
TRANSMISSIONS LISTED IN PARA 9C WITH //DG//, //DGC// OR //DGS// AT
THE END OF THE GEAR SERIAL NUMBER ARE CONSIDERED SERVICEABLE EVEN
THOUGH THE GEAR HAS A "P" (PAPA) PREFIX.
5. END ITEMS TO BE AFFECTED - ALL CH-47D, MH-47D AND MH-47E
AIRCRAFT.
6. ASSEMBLY COMPONENTS TO BE AFFECTED -
NOMENCLATURE PART NO. NSN
.
UNCLAS
06 13 151500Z MAY 91 OO PP UUUU ZEXW 1351200Z
YES
COMBINER TRANSMISSION 145D5300-10 1615-01-315-4069
COMBINER TRANSMISSION 145D5300-11 1615-01-315-9365
COMBINER TRANSMISSION 145D5300-13 1615-01-310-4980
COMBINER TRANSMISSION 145D5300-5 1615-01-216-3828
COMBINER TRANSMISSION 145D5300-3 1615-01-114-0850
COMBINER TRANSMISSION 145D5300-12 1615-01-310-4981
ENGINE TRANSMISSION 145D6300-3 1615-01-146-5273
ENGINE TRANSMISSION 145D6300-2 1615-01-119-3373
ENGINE TRANSMISSION 145D6300-9 1615-01-315-4070
ENGINE TRANSMISSION 145D6300-8 1615-01-320-6787
ENGINE TRANSMISSION 145D6300-6 1615-01-271-0663
ENGINE TRANSMISSION 145D6300-7 1615-01-271-7601
ENGINE TRANSMISSION 145D6300-10 1615-01-319-3959
ENGINE TRANSMISSION 145D6300-11 1615-01-315-9364
7. PARTS TO BE AFFECTED -
NOMENCLATURE PART NO. NSN
COMBINER GEAR 145D5305-3 3040-01-232-7777
COMBINER PINION 145D5306-3 3040-01-228-1730
ENGINE PINION 145D6301-2 3040-01-114-9452
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UNCLAS
07 13 151500Z MAY 91 OO PP UUUU ZEXW 1351200Z
YES
ENGINE GEAR 145D6302-2 3040-01-114-9453
8. INSPECTION PROCEDURES - N/A.
9. CORRECTION PROCEDURES -
NOTE
ALL REQUIREMENTS OF SOF MESSAGE CH-47-91-01 REMAIN VALID.
A. TRANSMISSIONS IN PARA 9C WILL BE DEPOT LEVEL INSPECTED FOR
CRACKS IN SUSPECT GEARS. GEARS WITH CRACKS WILL BE DESTROYED AND
REPLACED.
B. TRANSMISSIONS LISTED IN PARA 9C WITH GEARS THAT PASS
INSPECTION WILL HAVE //DG//, //DGC// OR //DGS// AT THE END OF THE
GEAR SERIAL NUMBER. THE GEAR SERIAL NUMBER WILL BE ENTERED ON DA
FORM 2408-16 (TRANSMISSION). TRANSMISSIONS LISTED IN PARA 9C WITH
//DG//, //DGC// OR //DGS// AT THE END OF THE GEAR SERIAL NUMBER AS
ENTERED ON DA FORM 2408-16 (TRANSMISSION) ARE CONSIDERED SERVICEABLE
EVEN THOUGH THE GEAR HAS A "P" (PAPA) PREFIX.
NOTE
ANY TRANSMISSION WITH A "M" (MIKE) AT THE FRONT OF THE GEAR SERIAL
NUMBER IS CONSIDERED SERVICEABLE.
C. THE FOLLOWING TRANSMISSION LIST IS UPDATED FROM SOF MESSAGE
.
UNCLAS
08 13 151500Z MAY 91 OO PP UUUU ZEXW 1351200Z
YES
CH-47-91-01. SOME TRANSMISSIONS HAVE BEEN DELETED BECAUSE THEY ARE
NOT IN THE ARMY INVENTORY. SOME TRANSMISSIONS HAVE BEEN ADDED
BECAUSE UNITS HAVE REPORTED ADDITIONAL TRANSMISSIONS CONTAINING
GEARS HAVING A SERIAL NUMBER WITH A PREFIX "P" (PAPA) IAW SOF
MESSAGE CH-47-91-01.
ENGINE TRANSMISSION SERIAL NUMBERS
A11-680 A11-760 A11-866
A11-681 A11-767 A11-867
A11-682 A11-773 A11-874
A11-683 A11-774 A11-876
A11-685 A11-775 A11-877
A11-686 A11-776 A11-879
A11-687 A11-783 A11-882
A11-688 A11-784 A11-883
A11-701 A11-785 A11-884
A11-704 A11-786 A11-885
A11-707 A11-789 A11-886
UNCLAS
09 13 151500Z MAY 91 OO PP UUUU ZEXW 1351200Z
YES
A11-708 A11-790 A11-887
A11-709 A11-791 A11-888
A11-710 A11-792 A11-889
A11-711 A11-795 A11-910
A11-712 A11-796 A11-911
A11-722 A11-797 A11-912
A11-725 A11-798 A11-924
A11-726 A11-807 A11-925
A11-729 A11-808 A11-936
A11-731 A11-809 A11-937
A11-732 A11-810 A11-938
A11-740 A11-811 A11-939
A11-743 A11-850 A11-944
A11-744 A11-851 A11-972
A11-747 A11-852 A11-973
A11-748 A11-853 A11-976
A11-754 A11-860
A11-759 A11-861
UNCLAS
10 13 151500Z MAY 91 OO PP UUUU ZEXW 1351200Z
YES
COMBINING TRANSMISSION SERIAL NUMBERS
A8-153 A8-382 A8-425
A8-209 A8-383 A8-430
A8-318 A8-394 A8-431
A8-324 A8-397 A8-434
A8-329 A8-398 A8-436
A8-334 A8-399 A8-448
A8-347 A8-400 A8-453
A8-354 A8-401 A8-454
A8-359 A8-402 A8-455
A8-368 A8-403 A8-465
A8-370 A8-406 A8-468
A8-371 A8-407 A8-473
A8-372 A8-408 A8-478
A8-375 A8-409 A8-480
A8-379 A8-416 A8-481
A8-381 A8-417 A8-482
UNCLAS
11 13 151500Z MAY 91 OO PP UUUU ZEXW 1351200Z
YES
10. SUPPLY/PARTS AND DISPOSITION -
A. PARTS REQUIRED - ITEMS CITED IN PARAGRAPH 6 MAY BE REQUIRED
TO REPLACE DEFECTIVE ITEMS.
B. REQUISITIONING INSTRUCTIONS - REQUISITION REPLACEMENT PARTS
THROUGH NORMAL SUPPLY CHANNELS USING NORMAL SUPPLY PROCEDURES.
C. BULK AND CONSUMABLE MATERIALS - N/A.
D. DISPOSITION - N/A.
E. DISPOSITION OF HAZARDOUS MATERIAL - N/A.
11. SPECIAL TOOLS, JIGS AND FIXTURES REQUIRED - N/A.
12. APPLICATION -
A. CATEGORY OF MAINTENANCE - N/A.
B. TIME REQUIRED - N/A.
C. ESTIMATED COST IMPACT OF STOCK FUND ITEMS 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 AS A RESULT OF THIS
INSPECTION - TB 1-1500-341-01, AIRCRAFT COMPONENTS REQUIRING
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UNCLAS
12 13 151500Z MAY 91 OO PP UUUU ZEXW 1351200Z
YES
MAINTENANCE MANAGEMENT AND HISTORICAL DATA REPORTS, DTD 26 NOV 91
SHALL BE CHANGED TO REQUIRE ENTRY OF GEAR SERIAL NUMBER ON 2408-16
(TRANSMISSION). A COPY OF THIS MESSAGE SHALL BE INSERTED IN THE
APPROPRIATE PUBLICATION AS AUTHORITY TO IMPLEMENT THE CHANGE UNTIL
THE PRINTED CHANGE IS RECEIVED.
13. REFERENCES - AVSCOM MESSAGE, DTG 022300Z APR 91, SUBJECT -
SAFETY OF FLIGHT MESSAGE, EMERGENCY, RCS CSGLD-1860(R1), ALL CH-47D,
MH-47D AND MH-47E AIRCRAFT, ONE TIME INSPECTION AND REMOVAL OF
COMBINER TRANSMISSIONS AND ENGINE TRANSMISSIONS CONTAINING SUSPECT
INPUT PINIONS AND GEARS (CH-47-91-01) (TB 1-1520-240-20-55).
14. RECORDING AND REPORTING REQUIREMENTS -
A. REPORTING COMPLIANCE SUSPENSE DATE (AIRCRAFT) - N/A.
B. TASK/INSPECTION REPORTING SUSPENSE DATE (AIRCRAFT) - N/A.
C. REPORTING SUSPENSE DATE (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 JAN 88 - DA FORM 2408-15,
HISTORICAL RECORD FOR AIRCRAFT.
15. WEIGHT AND BALANCE - N/A.
.
UNCLAS
13 13 151500Z MAY 91 OO PP UUUU ZEXW 1351200Z
YES
16. POINTS OF CONTACT -
A. TECHNICAL POINT OF CONTACT FOR THIS MESSAGE IS MR. ROBERT
LAWYER, AMSAV-ECC, DSN 693-1639 OR COMMERCIAL 314/263-1639.
B. LOGISTICAL POINT OF CONTACT FOR THIS MESSAGE IS MR. RICHARD
MOHS, SFAE-AV-CH-L, DSN 693-1415 OR COMMERCIAL 314/263-1415 AND
DATAFAX 314/263-1485.
C. FORMS AND RECORDS POINT OF CONTACT FOR THIS MESSAGE IS MR.
BOB BITER, AMSAV-MPPD, DSN 693-1955 OR COMMERCIAL 314/263-1955.
D. POINT OF CONTACT FOR THIS MESSAGE IS MR. BRAD MEYER,
AMSAV-XSOF, DSN 693-9089 OR COMMERCIAL 314/263-9089.
E. FOREIGN MILITARY SALES (FMS) RECIPIENTS REQUIRING
CLARIFICATION OF ACTION ADVISED BY THIS MESSAGE SHOULD CONTACT MR.
RON VAN REES, AMSAV-IOA, DSN 693-2626 OR COMMERCIAL 314/263-2626.
F. POINT OF CONTACT IN SOUTHWEST ASIA IS MR. J. NANCE,
COMMERCIAL 3-843-43-43, EXT 240 (IN COUNTRY).
G. AFTER HOURS CONTACT AVSCOM COMMAND OPERATIONS CENTER (COC)
DSN 693-2066/7 OR COMMERCIAL 314/263-2066/7.
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