Safety of Flight CH-47-91-01 |
SYNOPSIS CH-47-91-01 SAFETY OF FLIGHT MESSAGE, EMERGENCY, 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, (TB 55-1520-240-20-55). 022300Z APR 91, BRAD MEYER, AMSAV-XSOF, X9089. 01 17 022300Z APR 91 OO PP UUUU ZEXW 0921400Z YES CDRAVSCOM ST LOUIS MO //AMSAV-XSOF// AIG 8881 AIG 9004 AIG 8708 AIG 9042 CDR 321ST //MMC-AV// DCMD SOUTH ATLANTA MARIETTA GA //DMCDS-HPF// COMJTF-B SOTO CANO HO //ARFOR-AMO/AVN-TF// 102 ARMY AVIATION FACILITY SCOTT AFB IL //AFKB-AC-CJ-ASF// ARCENT SPT CMD //AMC-AVSCOM/G4-AVN// DCMD NORTHEAST BOSTON MA //DCMDN-QS// COMUSARCENT MAIN //AFRD-PA-S/G3-AVN/G4-AVN// RUDCAAA/HHC 22 SUPCOM (TAA) //ACSLOG/AVN// CDR VII CORPS MAIN FWD //G4// INFO DEFAIROCAS CANBERRA AS //ORHEL-AF// DEFAIRENG CANBERRA AS //DAIRENG-AF// DEFARM CANBERRA AS //DOHS-A// SFAE-AV-CH, AMSAV-ECC, AMSAV-I-RAAF, AMSAV-M, AMSAV-MCTCC, AMSAV-LRC BRAD MEYER AMSAV-XSOF, X9089 MINIMIZE CONSIDERED EDWARD J. HOLLMAN CHIEF, SAFETY OFFICE . UNCLAS 02 17 022300Z APR 91 OO PP UUUU ZEXW 0921400Z YES DEFNAV CANBERRA AS SRUSARSG CANBERRA AS HQLCENG MELBOURNE AS //DAIRENG// 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 USDAO DHAKA BG USDAO RANGOON BM . UNCLAS 03 17 022300Z APR 91 OO PP UUUU ZEXW 0921400Z YES USDAO COLOMBO CE USCINCPAC REP SUVA FJ DAO/MADP JAKARTA ID AMEMBASSY NEW DELHI IN //ODC// 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, 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 55-1520-240-20-55) 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, . UNCLAS 04 17 022300Z APR 91 OO PP UUUU ZEXW 0921400Z YES ACTIVITIES OR ELEMENTS AFFECTED OR CONCERNED. THE RETRANSMITTAL SHALL REFERENCE THE MESSAGE. ACTION ADDRESSES WILL IMMEDIATELY VERIFY THIS TRANSMISSION TO COMMANDER, AVSCOM, ATTN: AMSAV-XSOF (SOF COMPLIANCE OFFICER). 1. PRIORITY CLASSIFICATION - NOTE - PER AR 95-3, PARA 5-6A, MAJOR COMMANDERS MAY AUTHORIZE TEMPORARY EXCEPTION FROM SOF MESSAGE REQUIREMENTS. EXCEPTIONS 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 THE CONDITION STATUS SYMBOL OF THE CITED AIRCRAFT WILL BE CHANGED TO A RED //X//. THE RED //X// MAY BE CLEARED WHEN THE INSPECTION OF PARA 8 BELOW IS COMPLETED. AIRCRAFT AWAY FROM HOME BASE MAY BE DOWNGRADED TO A CIRCLED RED //X// FOR A ONE TIME DIRECT FLIGHT TO THE NEAREST MILITARY BASE WITH ADEQUATE SECURITY AND MAINTENANCE CAPABILITIES. FOR THOSE AIRCRAFT IN SOUTHWEST ASIA A SECOND FERRY FLIGHT TO PORT MAY BE REQUIRED. FLIGHT WILL CONSIST OF MINIMUM CREW, LOW GROSS . UNCLAS 05 17 022300Z APR 91 OO PP UUUU ZEXW 0921400Z YES WEIGHT AND LOW LEVEL FLIGHT NOT TO EXCEED 500 AGL. AIRCRAFT ON RED //X// STATUS SYMBOL WILL BE MAINTAINED IN FLYABLE STORAGE. GROUND RUN-UPS AT NORMAL OPERATING ROTOR RPM ARE AUTHORIZED. B. AIRCRAFT IN DEPOT MAINTENANCE - AIRCRAFT WILL NOT BE ISSUED UNTIL COMPLIANCE WITH THIS SOF HAS BEEN COMPLETED. C. AIRCRAFT UNDERGOING MAINTENANCE - AIRCRAFT WILL NOT BE RELEASED UNTIL COMPLIANCE WITH THIS SOF MESSAGE HAS BEEN COMPLETED. D. AIRCRAFT IN TRANSIT - (1) SURFACE/AIR SHIPMENT - PRIOR TO FIRST FLIGHT AT FINAL DESTINATION. (2) FERRY STATUS - 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 AND C) - N/A. F. COMPONENT/PARTS IN STOCK INCLUDING WAR RESERVES AT ALL LEVELS (DEPOT AND OTHERS) - UPON RECEIPT OF THIS MESSAGE ALL ITEMS LISTED IN PARAGRAPHS 6 AND 7 BELOW SHALL BE PLACED IN CONDITION CODE //J// AND RETAGGED WITH A MATERIEL CONDITION TAG/LABEL - SUSPENDED . UNCLAS 06 17 022300Z APR 91 OO PP UUUU ZEXW 0921400Z YES (BROWN TAG) DD FORM 1575 OR LABEL DD FORM 1575-1. THE REMARKS BLOCK MUST REFERENCE INSPECTION REQUIRED PER THIS MESSAGE (TB 55-1520-240-20-55). UPON COMPLETION OF THE REQUIRED INSPECTION, ITEMS WILL BE RETAGGED EITHER SERVICEABLE (YELLOW TAG) DD FORM 1574 OR UNSERVICEABLE/REPARABLE (GREEN TAG) DD FORM 1577-2 DEPENDENT UPON THE RESULTS. NOTE - DEPOTS THAT DO NOT HAVE THE CAPABILITY TO INSPECT THE SUBJECT ASSEMBLIES IN ACCORDANCE WITH THIS MESSAGE, CONTACT THE LOGISTICAL POINT OF CONTACT. DO NOT ISSUE UNTIL THIS SAFETY OF FLIGHT MESSAGE HAS BEEN COMPLIED WITH AND YOU HAVE BEEN NOTIFIED WHICH ARE SERVICEABLE. 2. TASK/INSPECTION SUSPENSE DATE - PRIOR TO NEXT FLIGHT. 3. REPORTING COMPLIANCE SUSPENSE DATE - WITHIN 15 WORKING DAYS OF THE DATE OF THIS MESSAGE PER PARA 14A. 4. SUMMARY OF PROBLEM - A. RECENTLY A CH-47D HELICOPTER EXPERIENCED A CLASS A ACCIDENT. WHILE INFLIGHT AT HIGH GROSS WEIGHT AND LOW ALTITUDE THE CREW NOTED A NO. 2 ENGINE TRANSMISSION HOT LIGHT AND SMOKE SWIRLING . UNCLAS 07 17 022300Z APR 91 OO PP UUUU ZEXW 0921400Z YES AROUND THE ENGINE. B. TEARDOWN ANALYSIS OF THE COMPONENTS REVEALED THAT THE NO. 2 ENGINE TRANSMISSION FAILED FROM FATIGUE ORIGINATING IN A GRINDING DEFECT AT TIME OF MANUFACTURE. BECAUSE THE SECOND SOURCE MANUFACTURER'S GRINDING AND INSPECTION PROCESSES ARE SUSPECT IT IS NECESSARY TO REMOVE ALL GEARS RECEIVED FROM THIS MANUFACTURER FROM SERVICE FOR INSPECTION. THIS MANUFACTURER HAS MADE FOUR DIFFERENT GEARS USED IN ENGINE AND COMBINING TRANSMISSION. SUSPECT GEARS ARE IN 135 ENGINE AND COMBINING TRANSMISSIONS OF WHICH 56 AIRCRAFT MAY BE AFFECTED. THE BALANCE ARE IN SPARES. C. THE PURPOSE OF THIS MESSAGE IS TO DIRECT A RECORDS CHECK OF ALL ENGINE AND COMBINING TRANSMISSIONS TO IDENTIFY THOSE TRANSMISSIONS CONTAINING SUSPECT GEARS AND TO REMOVE THOSE SUSPECT TRANSMISSIONS FROM SERVICE. 5. END ITEMS TO BE INSPECTED - ALL MH-47D AIRCRAFT. ALL CH-47D AIRCRAFT. CH-47D AIRCRAFT SERIAL NUMBERS 90-0196 AND SUBSEQUENT WILL BE INSPECTED/CORRECTED BY CONTRACTOR DURING PRODUCTION AND THEREFORE RECORDS FOR AIRCRAFT SERIAL NUMBERS 90-0196 AND SUBSEQUENT . UNCLAS 08 17 022300Z APR 91 OO PP UUUU ZEXW 0921400Z YES WILL NOT REQUIRE IDENTIFICATION OF THIS ACTION. MH-47E AIRCRAFT SERIAL NUMBER 88-0267 WILL BE INSPECTED/CORRECTED BY CONTRACTOR THEREFORE ITS RECORDS WILL NOT REQUIRE IDENTIFICATION OF THIS ACTION. 6. ASSEMBLY COMPONENTS TO BE INSPECTED - NOMENCLATURE PART NO. NSN COMBINER TRANSMISSION 145D5300-10 1615-01-315-4069 COMBINER TRANSMISSION 145D5300-11 1615-01-315-9365 COMBINER TRANSMISSION 145D5300-13 1615-01-131-4980 COMBINER TRANSMISSION 145D5300-5 1615-01-216-3828 COMBINER TRANSMISSION 145D5300-3 1615-01-114-0850 COMBINER TRANSMISSION 145D5300-12 1615-01-310-4981 COMBINER TRANSMISSION 145D5300-9 1615-01-312-2390 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 . UNCLAS 09 17 022300Z APR 91 OO PP UUUU ZEXW 0921400Z YES ENGINE TRANSMISSION 145D6300-4/-7 1615-01-271-7601 ENGINE TRANSMISSION 145D6300-11 1615-01-315-9364 ENGINE TRANSMISSION 145D6300-10 1615-01-319-3959 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 ENGINE GEAR 145D6302-2 3040-01-114-9453 NOTE UNSERVICEABLE GEARS ARE IDENTIFIED BY HAVING THE LETTER "P" (PAPA) AT THE FRONT OF THE SERIAL NUMBER. 8. INSPECTION PROCEDURES - A. CHECK AIRCRAFT RECORDS TO DETERMINE NEW OR OVERHAUL DATE OF ENGINE TRANSMISSIONS AND COMBINING TRANSMISSIONS. B. TRANSMISSIONS MANUFACTURED OR OVERHAULED ON OR BEFORE JUNE 87 ARE CONSIDERED SERVICEABLE AND INSPECTION IS COMPLETE. C. IF MANUFACTURING DATE IS NOT KNOWN OR TRANSMISSIONS WERE . UNCLAS 10 17 022300Z APR 91 OO PP UUUU ZEXW 0921400Z YES OVERHAULED AFTER JUNE 87, CHECK THE FOLLOWING: (1) THE FOLLOWING TRANSMISSIONS BY SERIAL NUMBER ARE CONSIDERED UNSERVICEABLE: ENGINE TRANSMISSION SERIAL NUMBERS A11-680 A11-767 A11-874 A11-681 A11-773 A11-876 A11-682 A11-774 A11-877 A11-683 A11-775 A11-879 A11-685 A11-776 A11-882 A11-686 A11-783 A11-883 A11-687 A11-784 A11-884 A11-688 A11-785 A11-885 A11-701 A11-789 A11-886 A11-704 A11-790 A11-887 A11-707 A11-791 A11-888 A11-708 A11-792 A11-889 A11-709 A11-795 A11-910 A11-711 A11-796 A11-911 UNCLAS 11 17 022300Z APR 91 OO PP UUUU ZEXW 0921400Z YES A11-712 A11-797 A11-912 A11-716 A11-798 A11-914 A11-722 A11-807 A11-915 A11-725 A11-808 A11-917 A11-726 A11-809 A11-920 A11-729 A11-810 A11-924 A11-731 A11-811 A11-925 A11-732 A11-850 A11-936 A11-743 A11-851 A11-937 A11-744 A11-852 A11-938 A11-747 A11-853 A11-939 A11-748 A11-860 A11-944 A11-754 A11-861 A11-972 A11-759 A11-866 A11-973 A11-760 A11-867 A11-976 COMBINING TRANSMISSION SERIAL NUMBERS A8-153 A8-382 A8-425 A8-209 A8-383 A8-430 UNCLAS 12 17 022300Z APR 91 OO PP UUUU ZEXW 0921400Z YES A8-318 A8-394 A8-434 A8-324 A8-397 A8-431 A8-329 A8-398 A8-436 A8-334 A8-399 A8-448 A8-347 A8-400 A8-453 A8-354 A8-401 A8-455 A8-359 A8-402 A8-465 A8-368 A8-403 A8-468 A8-370 A8-406 A8-473 A8-371 A8-407 A8-478 A8-372 A8-408 A8-480 A8-375 A8-409 A8-481 A8-379 A8-416 A8-482 A8-381 A8-417 A8-488 (2) TRANSMISSIONS WITH DA FORM 2408-16 LISTING GEARS OR PINIONS IN PARAGRAPH 7 HAVING A SERIAL NUMBER WITH THE PREFIX "P" (PAPA) ARE CONSIDERED UNSERVICEABLE. (3) TRANSMISSIONS WITH DA FORM 2408-16 THAT DOES NOT LIST . UNCLAS 13 17 022300Z APR 91 OO PP UUUU ZEXW 0921400Z YES GEARS OR PINIONS ARE CONSIDERED UNSERVICEABLE UNLESS DETERMINED SERVICEABLE BY LOGISTICAL POC. CONTACT LOGISTICAL POC. C. AIRCRAFT AWAY FROM HOME BASE MAY BE DOWNGRADED TO A CIRCLED RED \\X\\ FOR A ONE TIME FLIGHT TO THE NEAREST MILITARY BASE WITH ADEQUATE SECURITY AND MAINTENANCE CAPABILITIES. FOR THOSE AIRCRAFT IN SOUTHWEST ASIA A SECOND FERRY FLIGHT TO PORT MAY BE REQUIRED. FLIGHT WILL CONSIST OF MINIMUM CREW, LOW GROSS WEIGHT AND LOW LEVEL FLIGHT NOT TO EXCEED 500 AGL. D. UNITS WILL BE PROVIDED DISPOSITION INSTRUCTIONS FROM LOGISTICAL POINT OF CONTACT BY FOLLOWUP COMMUNICATION. E. CONTROLLED SUBSTITUTION IS AUTHORIZED TO MINIMIZE AFFECTED AIRCRAFT. 9. CORRECTION PROCEDURES - SEE PARAGRAPH 8. 10. SUPPLY/PARTS AND DISPOSITION - A. PARTS REQUIRED - ITEMS CITED IN PARAGRAPH 6 MAY BE REQUIRED TO REPLACE DEFECTIVE ITEMS. B. REQUISITIONING INSTRUCTIONS - CONTACT LOGISTICAL POINT OF CONTACT FOR REQUISITIONING INSTRUCTIONS. . UNCLAS 14 17 022300Z APR 91 OO PP UUUU ZEXW 0921400Z YES C. BULK AND CONSUMABLE MATERIALS - N/A. D. DISPOSITION - UNITS WILL BE PROVIDED DISPOSITION INSTRUCTIONS. E. DISPOSITION OF HAZARDOUS MATERIAL - N/A. 12. APPLICATION - A. CATEGORY OF MAINTENANCE - AVUM. AIRCRAFT DOWNTIME WILL BE CHARGED TO AVUM. B. TIME REQUIRED - (1) TOTAL OF .5 MANHOURS USING 1 PERSON TO CONDUCT RECORDS CHECK. (2) TOTAL OF 6 MANHOURS USING 2 PERSONS TO REMOVE 1 AFFECTED COMBINER TRANSMISSION OR ENGINE TRANSMISSION. (3) TOTAL OF 6 HOURS DOWNTIME FOR ONE END ITEM. 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 . UNCLAS 15 17 022300Z APR 91 OO PP UUUU ZEXW 0921400Z YES INSPECTION - N/A. 13. REFERENCES - N/A. 14. RECORDING AND REPORTING REQUIREMENTS - A. REPORTING COMPLIANCE SUSPENSE DATE (AIRCRAFT) - UPON ENTERING REQUIREMENTS OF THIS MESSAGE ON DA FORM 2408-13, FORWARD A PRIORITY MESSAGE, DATAFAX OR E-MAIL TO COMMANDER, AVSCOM, ATTN AMSAV-XSOF (SOF COMPLIANCE OFFICER), PER AR 95-3. DATAFAX NUMBER IS DSN 693-2064 OR COMMERCIAL 314/263-2064. E-MAIL ADDRESS IS "AMSAVXSOF (AT SIGN) ST-LOUIS-EMH3.ARMY.MIL". THE REPORT WILL CITE THIS MESSAGE NUMBER, DATE OF ENTRY IN DA FORM 2408-13, THE AIRCRAFT MISSION DESIGN SERIES AND SERIAL NUMBERS OF AIRCRAFT IN NUMERICAL ORDER. B. TASK/INSPECTION REPORTING SUSPENSE DATE (AIRCRAFT) - UPON COMPLETION OF INSPECTION UNITS SHALL FORWARD A PRIORITY MESSAGE TO COMMANDER AVSCOM, ATTN: SFAE-AV-CH-L. THE REPORT WILL CITE THIS MESSAGE, DATE OF INSPECTION, AIRCRAFT S/N, AIRCRAFT AFFECTED, ENGINE AND/OR COMBINING TRANSMISSION SERIAL NUMBER, POC AND PHONE NUMBER. C. REPORTING SUSPENSE DATE (SPARES) - DEPOT COMMANDERS AND . UNCLAS 16 17 022300Z APR 91 OO PP UUUU ZEXW 0921400Z YES OTHERS HOLDING ASSETS REFERENCED IN PARA 6 AND 7 SHALL CONTACT BY TELEPHONE OR FORWARD A PRIORITY MESSAGE TO THE POC IN PARA 16D CONFIRMING MESSAGE RECEIPT. D. TASK/INSPECTION REPORTING SUSPENSE DATE (SPARES) - UPON COMPLETION OF THE INSPECTION DEPOT COMMANDERS AND OTHERS HOLDING STOCK SHALL FORWARD A PRIORITY MESSAGE REPORT OF RESULTS OF THIS INSPECTION TO LOGISTICAL POC BELOW NLT 2 DAYS AFTER RECEIPT OF THIS MESSAGE. THE REPORT SHALL INCLUDE QUANTITY ON HAND, QUANTITY WHICH PASSED INSPECTION AND QUANTITY WHICH FAILED INSPECTION. E. THE FOLLOWING FORMS ARE APPLICABLE AND ARE TO BE COMPLETED IN ACCORDANCE WITH DA PAM 738-751, 15 JAN 88 - (1) DA FORM 2408-13, AIRCRAFT INSPECTION AND MAINTENANCE RECORD. (2) DA FORM 2408-15, HISTORICAL RECORD FOR AIRCRAFT. (3) DA FORM 2408-16 (AIRCRAFT), AIRCRAFT COMPONENT HISTORICAL RECORD. 15. WEIGHT AND BALANCE - N/A. 16. POINTS OF CONTACT - A. TECHNICAL POINT OF CONTACT FOR THIS MESSAGE IS MR. LARRY . UNCLAS 17 17 022300Z APR 91 OO PP UUUU ZEXW 0921400Z YES WIESCHAUS, 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. 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 AND DATAFAX 314/263-1485. 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. |