Safety of Flight CH-47-91-02 |
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 . 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 . 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. |