# JASC 7260: Turbine Engine Accessory Drive

- Type: JASC system/component code (FAA)
- ATA chapter: 72 Turbine/turboprop Engine
- Title in the code table: TURBINE ENGINE ACCESSORY DRIVE
- Service difficulty reports: 1,098
- FAA code table: https://www.faa.gov/sites/faa.gov/files/JASC_Code.pdf#page=61
- Page: https://openairdocs.org/jasc/7260

## What it covers

The engine mounted gearbox which provides mechanical power takeoffs to drive accessories such as pumps, generators, chip detectors. Does not include the remote gearboxes which are filed in JASC code 8300.

## Service difficulty reports (1,098, newest 50)

- [SDR I5PA2026101488801](https://openairdocs.org/sdr/I5PA2026101488801), Oct 14, 2026: Boeing 757230. CHIP DETECTOR. DAMAGED. ETOPS SIGNIFICANT REPORT, FOUND CHIP DETECTOR ON THE OIL SCAVENGE LINE FROM THE ANGLE GEARBOX ON THE LT ENGINE DAMAGED.  (N888LT)
- [SDR I5PA2026090968805](https://openairdocs.org/sdr/I5PA2026090968805), Sep 9, 2026: Boeing 757230. CHIP DETECTOR. MISSING. ETOPS SIGNIFICANT REPORT. RT ENGINE CHIP DETECTOR MISSING DURING INSPECTION. REPLACED RT CHIP DETECTOR IAW APPLICABLE AM (N688SL)
- [SDR UIEA2026061200463](https://openairdocs.org/sdr/UIEA2026061200463), Jun 12, 2026: Boeing 747412F. CHIP DETECTOR. UNSECURE. ENGINE 1 OIL QUANTITY LOSS IN FLIGHT, SHOWING 0 AT CRUISE STARTED AT 10 AFTER TAKEOFF. ACCOMPLISHED ENGINE OIL INSPECTIO (N489MC)
- [SDR 2026FA0000414](https://openairdocs.org/sdr/2026FA0000414), May 20, 2026: Airbus A300*. SEAL. WRONG PART. DURING THE DISASSEMBLY OF RR XWB-97K EGB EG0527, THE PRESENCE OF A DYNAMIC SEAL P/N NOT LISTED IN THE APPROVED DATA FOR 
- [SDR 2026FA0000304](https://openairdocs.org/sdr/2026FA0000304), Apr 28, 2026: Urocop EC130B4. CHIP DETECTOR. FALSE INDICATION. ENGINE CHIP EVENT - INTERMITTENT ILLUMINATION OF ENGINE CHIP INDICATION DURING CRUISE FLIGHT AFTER MAKING A TURN. DURING (N11QZ)
- [SDR 2025FA0000281](https://openairdocs.org/sdr/2025FA0000281), Apr 17, 2025: Boeing 7478. LINK. LOOSE. AXIAL LINK FAN COWL TO AGB AFT BEARING LOOSE BOTH SIDES --- SN F1A0RHFT AND F1A0RHFK (N747EF)
- [SDR 2025F00091](https://openairdocs.org/sdr/2025F00091), Apr 11, 2025: Airbus A300*. GEARBOX. MISOVERHAULED. WHILE DISASSEMBLING RR TRENTXWB EGB P/N 90500-02 S/N EG1048, 2 SCREWS (AS3237-14) WERE FOUND AMONG THE 4 TGB BEARING SUP
- [SDR 2024FA0000978](https://openairdocs.org/sdr/2024FA0000978), Dec 20, 2024: GEARBOX. LEAKING. FOLLOWING EGB REASSEMBLY, A LEAK TEST IS PERFORMED ACCORDING TO CMM REQUIREMENT. THIS TEST REVEALED A LEAK LOCATED INTO 
- [SDR 2024F00162](https://openairdocs.org/sdr/2024F00162), Jul 5, 2024: GEARBOX. MISMANUFACTURED. RR, TRENT XWB 97K, EGB P/N 94500D07 S/N EG5073 WAS RELEASED ON 17 JANUARY 2024. IT IS STRONGLY SUSPECTED THAT THIS EGB W
- [SDR IPXA2024061846640](https://openairdocs.org/sdr/IPXA2024061846640), Apr 24, 2024: Airbus A300F4622R. BULKHEAD WEB. DAMAGED. FAULT: #2 ENGINE INLET COWL AFT BULKHEAD IS DAMAGED AROUND I/B P-2 LINE. DOT 142-53. INSTALLED NEW WEB AND SPLICE. IAW A (N159UP)
- [SDR 2024FA0000287](https://openairdocs.org/sdr/2024FA0000287), Apr 4, 2024: Airbus A320*. O-RING. MISSING. PEGASUS (PGT) AIRCRAFT TC-NBP EXPERIENCED AOG DUE TO IDG OIL LEAK ON ENGINE #2 (ESN 598246) ON JULY 11TH 2023. TROOBLESH
- [SDR 2023F00351](https://openairdocs.org/sdr/2023F00351), Dec 21, 2023: GEARBOX. MISINSTALLED. ON CFM LEAP-1A ENGINE, ACCESSORY GEARBOX (AGB) P/N 362-001-242-0 S/N 1P000607: OIL NOZZLE P/N 91D16602 IS ATTACHED ON CO
- [SDR 2023F00348](https://openairdocs.org/sdr/2023F00348), Dec 21, 2023: O-RING. INCORRECT. CFM56-5B ACCESSORY GEARBOX GB (AGB) P/N 338-089-703-0 APPROVED DESIGN DATA INCLUDE A PACKING PREFORMED O-RING P/N 649-39
- [SDR ASAA2023102245778](https://openairdocs.org/sdr/ASAA2023102245778), Oct 22, 2023: Boeing 737990ER. UNKNOWN. UNKNOWN. #1 ENG START SW WILL NOT STAY ENGAGED IN GRD POSITION. WHEN HOLDING START SW MANUALLY -NO-US. GROUNDED - YES. PERFORMED  (N431AS)
- [SDR HALA202310230046](https://openairdocs.org/sdr/HALA202310230046), Oct 20, 2023: Boeing 717200. UNKNOWN. UNKNOWN. AUDIBLE BANG. FLASH COMPRESSOR STALL EAD; RIGHT ENGINE. PERFORMED VISUAL INSPECTION OF INLET AND EXHAUST. LOOKS GOOD PER (N495HA)
- [SDR 2023FA0000804](https://openairdocs.org/sdr/2023FA0000804), Oct 1, 2023: Airbus A320*. O-RING. UNKNOWN. PEGASUS (PGT) AIRCRAFT TC-NBP EXPERIENCED AOG DUE TO IDG OIL LEAK ON ENGINE #2 (ESN 598246) ON JULY 11TH 2023. TROOBLESH
- [SDR ASAA2023092945370](https://openairdocs.org/sdr/ASAA2023092945370), Sep 29, 2023: Boeing 737890. ENGINE. MAKING METAL. REF. W/O 1970762 T/C PWRPL-79EO-06942-1 FOUND #1 ENG FWD SUMP CHIP DETECTOR WITH MAGNETIC MATERIAL. GROUNDED - YES. ENGI (N581AS)
- [SDR 2023F00245](https://openairdocs.org/sdr/2023F00245), Aug 2, 2023: Airbus A320*. UNKNOWN. UNKNOWN. TITLE: CRESMANA FR.145.0229.2023_04 CFM LEAP-1A METALLIC SCREWS AND BOLT USED AS PROTECTIVE CLOSURES FOR SHIPPING AGB CF
- [SDR 2023F00215](https://openairdocs.org/sdr/2023F00215), Jun 29, 2023: PLUG. WRONG PART. EGB WAS RECEIVED FOR A MAINTENANCE OPERATION NOT RELATED TO THIS EVENT, FROM CUSTOMER. THIS EGB WAS NEVER BEFORE BY THE 
- [SDR ASAA2023050343105](https://openairdocs.org/sdr/ASAA2023050343105), May 3, 2023: Boeing 737990ER. PACKING. LEAKING. WHILE ACCOMPLISHING ASA T/C 78472000, #2 ENG INLET INSPECTION, EVIDENCE OF OIL LEAK COMING FROM #2 ENG DRIVE PAD. GROUND (N433AS)
- [SDR ASAA2023030642215](https://openairdocs.org/sdr/ASAA2023030642215), Mar 6, 2023: Boeing 737890. PACKING. LEAKING. #2 ENG AGB DRIVE-PAD LEAKING. GROUNDED - YES. REMOVED AND REPLACED O-RINGS UP UNTIL REF B737-800 AMM 72-63-01-400-801 F0 (N514AS)
- [SDR ASAA2023022542253](https://openairdocs.org/sdr/ASAA2023022542253), Feb 25, 2023: Boeing 737890. LUBRICATION UNIT. LEAKING. #1 ENGINE OIL TREND DATA SHOWS OIL CONSUMPTION TO GREATER THAN EXPECTED. ENGINE POWER RUN REQUIRED. GROUNDED - YES. FOUN (N529AS)
- [SDR ASAA2023021942004](https://openairdocs.org/sdr/ASAA2023021942004), Feb 19, 2023: Boeing 737990ER. SEAL. WORN. #2 ENGINE OIL TREND DATA SHOWS OIL CONSUMPTION STILL GREATER THAN EXPECTED. GROUNDED - YES. PER TSR NOTES ACCOMP STEP 5  (N402AS)
- [SDR ASAA2023020641850](https://openairdocs.org/sdr/ASAA2023020641850), Feb 6, 2023: Boeing 737890. PACKING. LEAKING. #1 ENGINE GEAR BOX PAD LEAKING. GROUNDED - YES. #1 ENGINE ACCESSORY GEARBOX STARTER DRIVE PAD ASSEMBLY REMOVED. SEALS AN (N519AS)
- [SDR ASAA2023012841724](https://openairdocs.org/sdr/ASAA2023012841724), Jan 28, 2023: Boeing 737990ER. SEAL. LEAKING. #1 ENGINE OIL TREND DATA SHOWS OIL CONSUMPTION TO GREATER THAN EXPECTED. ENGINE POWER RUN REQUIRED. GROUNDED - YES. BAGG (N478AS)
- [SDR ASAA2022091240004](https://openairdocs.org/sdr/ASAA2022091240004), Sep 12, 2022: Boeing 737890. ENGINE. LEAKING. #1 ENGINE OIL TREND DATA CONTINUES TO SHOW OIL CONSUMPTION TO GREATER THAN EXPECTED. GROUNDED - YES. REMOVED N2 DRIVE PA (N538AS)
- [SDR ASAA2022082139578](https://openairdocs.org/sdr/ASAA2022082139578), Aug 21, 2022: Boeing 737990ER. ENGINE. LEAKING. #1 ENGINE OIL TREND DATA SHOWS OIL CONSUMPTION HIGHER THAN EXPECTED. ENGINE POWER RUN REQUIRED. GROUNDED - YES. ACCOMPLI (N472AS)
- [SDR ASAA2022081039478](https://openairdocs.org/sdr/ASAA2022081039478), Aug 10, 2022: Boeing 7379. SEAL. LEAKING. #2 ENG DRIVEN PUMP DRIVE PAD LEAKING OIL BEYOND LIMITS (REF ASA TSR 7127748). GROUNDED - YES. REPLACED #2 ENG HYD PUMP A (N913AK)
- [SDR ASAA2022080539406](https://openairdocs.org/sdr/ASAA2022080539406), Aug 5, 2022: Boeing 737990ER. SEAL. LEAKING. REF ASA TSR 712689, #2 IDG DRIVE PAD OIL LEAK OUT OF LIMITS. GROUNDED - YES. REPLACED THE #2 IDG DRIVE PAD SEALOL AND ID (N433AS)
- [SDR ASAA2022072239309](https://openairdocs.org/sdr/ASAA2022072239309), Jul 22, 2022: Boeing 737890. SEAL. LEAKING. #2 ENGINE CONTINUES TO SHOW GREATER THAN EXPECTED OIL CONSUMPTION. GROUNDED - YES. REMOVED AND REPLACED SEALOL SEAL IAW  (N583AS)
- [SDR ASAA2022070738998](https://openairdocs.org/sdr/ASAA2022070738998), Jul 7, 2022: Boeing 7379. GEARBOX. WORN. FOUND DAMAGE ON MATING SURFACE OF TRANSFER G/B SLIDER WHILE ACCOMPLISHING SBLEAP-1B-72-0317-BS7-1 #1 ENGINE. GROUNDED -  (N971AK)
- [SDR ASAA2022070538939](https://openairdocs.org/sdr/ASAA2022070538939), Jul 5, 2022: Boeing 737890. SEAL. LEAKING. ENG #2 OIL CONSUMPTION IS HIGHER THAN NORMAL. GROUNDED - YES. ACOMPLISHED TSR STEPS 1 THROUGH 5 NOTED & LARGE AMOUNT OF  (N596AS)
- [SDR ASAA2022062438938](https://openairdocs.org/sdr/ASAA2022062438938), Jun 24, 2022: Boeing 737990ER. IDG. LEAKING. #1 ENGINE OIL TREND DATA SHOWS OIL CONSUMPTION TO GREATER THAN EXPECTED. ENGINE POWER RUN REQUIRED. GROUNDED - YES. OPEN (N459AS)
- [SDR ASAA2022061738936](https://openairdocs.org/sdr/ASAA2022061738936), Jun 17, 2022: Boeing 737890. O-RING. LEAKING. #2 ENGINE OIL TREND DATA SHOWS OIL CONSUMPTION TO GREATER THAN EXPECTED. ENGINE POWER RUN REQUIRED RECOMMEND SEA ONLY. G (N583AS)
- [SDR ASAA2022061338649](https://openairdocs.org/sdr/ASAA2022061338649), Jun 13, 2022: Boeing 737890. O-RING. LEAKING. #2 ENGINE DRIPPING LIQUID. GROUNDED - YES. RAN #2 ENGINE FOR 5 MIN OIL LEAK TO BE COMING FROM BASE OF OIL FUEL HEAT EXCH (N532AS)
- [SDR ASAA2022053038504](https://openairdocs.org/sdr/ASAA2022053038504), May 30, 2022: Boeing 737890. SEAL. LEAKING. #2 ENGINE OIL CONSUMPTION IS HIGHER THAN DESIRED. CURRENT OIL CONSUMPTION .4. GROUNDED - YES. COMPLETED STEPS 1 AND 2 OF (N583AS)
- [SDR ASAA2022051638354](https://openairdocs.org/sdr/ASAA2022051638354), May 16, 2022: Boeing 737990ER. SEAL. LEAKING. #2 ENG IDG PAD DRAIN LEAKING OIL OUT OF LIMITS. GROUNDED - YES. REPLACED THE #2 ENGINE IDG DRIVE PAD SEALOL REF B737-900 (N433AS)
- [SDR ASAA2022042438112](https://openairdocs.org/sdr/ASAA2022042438112), Apr 24, 2022: Boeing 737990ER. IDG. LEAKING. #2 ENGINE OIL TREND DATA SHOWS OIL CONSUMPTION TO GREATER THAN EXPECTED. ENGINE POWER RUN REQUIRED. GROUNDED - YES. ACCO (N468AS)
- [SDR ASAA2022042038074](https://openairdocs.org/sdr/ASAA2022042038074), Apr 20, 2022: Boeing 737. NONE. NONE. #1 ENGINE OIL TREND DATA SHOWS OIL CONSUMPTION TO GREATER THAN EXPECTED. ENGINE POWER RUN REQUIRED. GROUNDED - YES. BAGG (N468AS)
- [SDR 2022F00191](https://openairdocs.org/sdr/2022F00191), Apr 13, 2022: Boeing 737. BEARING. OUT OF LIMITS. FOLLOWING DECLARATION OF OUR CONTRACTOR SAFRAN TRANSMISSION SYSTEM ABOUT APPROVED DATA INCONSISTANCY HE FOUND OUT TYPO I
- [SDR H31Y20220225001](https://openairdocs.org/sdr/H31Y20220225001), Feb 23, 2022: Airbus A330941. NONE. NONE. DURING EGB (EXTERNAL GEARBOX) MAINTENANCE AT SHOP VISIT, 4 KEYLOCKED INSERTS WERE FOUND LOOSE OR MISSING ON HMU COVER PA
- [SDR H31Y20221802001](https://openairdocs.org/sdr/H31Y20221802001), Feb 18, 2022: Boeing 737. BEARING. OUT OF TOLERANCE. DETECTION OF BEARINGS WITH RADIAL CLEARANCE OUT OF TOLERANCE ASSEMBLED ON ACCESSORY GEARBOX. AFTER INVESTIGATION, 4 BEAR
- [SDR ASAA2022012337226](https://openairdocs.org/sdr/ASAA2022012337226), Jan 23, 2022: Boeing 737890. SEAL. LEAKING. NUMBER 2 ENGINE HAS OIL LEAK. GROUNDED - YES. ENGINE #2 HAND CRANKING DRIVE COVER MINOR LEAK. REPLACED DRIVE COVER SEALS (N587AS)
- [SDR H31Y20220215](https://openairdocs.org/sdr/H31Y20220215), Jan 19, 2022: Airbus A350941. GEARBOX. CORRODED. DURING EGB ASSEMBLY, FITTER HAVE DETECTED A NEW DYNAMIC SEAL AFFECTED BY CORROSION. AFTER FIRST INVESTIGATION, 7 DYNAMIC
- [SDR 2022F00072](https://openairdocs.org/sdr/2022F00072), Dec 30, 2021: Boeing 737800*. NONE. LEAKING. N2 DRIVE PAD DRAIN WITH CONSTANT OIL LEAK OF 40 DROPS PER MINUTE, DURING THE OVERNIGHT AT MEX STATION AND IN ACCORDANCE 
- [SDR ASMF202110021](https://openairdocs.org/sdr/ASMF202110021), Sep 13, 2021: Boeing 73786J. SEAL. DAMAGED. DURING OVERNIGHT CHECK AT MEX STATION, DUE TO BORESCOPE INSPECTION AT LEFT ENGINE. MAINTENANCE PERSONNEL PERFORMED LEFT  (N377AR)
- [SDR UIEA2021011900086](https://openairdocs.org/sdr/UIEA2021011900086), Jan 14, 2021: Boeing 76733A. SKIN. DENTED. NR 1 ENGINE INLET HAS SEVERAL DENTS ON INNER BARREL SLEEVE. REMOVED AND REPLACED NR 1 ENGINE INLET COWL ASSEMBLY, IAW B7 (N1997A)
- [SDR ASAA2020081733029](https://openairdocs.org/sdr/ASAA2020081733029), Aug 13, 2020: Boeing 737890. ATTACH BRACKET. DAMAGED. NR 2 ENG INLET AND FAN BLADE DETAILED INSPECTION. FOUND GOUGES ON DRAIN PLATE, AFT SIDE OF ASSY DRIVE GEAR BOX AT THE MA (N569AS)
- [SDR JTAA202007270001](https://openairdocs.org/sdr/JTAA202007270001), Jul 24, 2020: Casa C212CC. ENGINE. INOPERATIVE. DURING CRUISE FLIGHT, 50 MILES FROM HK01, #1 ENGINE FAILED. CREW PERFORMED APPROPRIATE EMERGENCY PROCEDURE, ANALYZED PER (N604AR)
- [SDR JOZA2020051400001](https://openairdocs.org/sdr/JOZA2020051400001), May 13, 2020: Pilats PC1247E. CHIP DETECTOR. CONTAMINATED. DURING TAKEOFF ROLL THE PILOT OBSERVED A MASTER CAUTION WARNING AND ASSOCIATED ENGINE CHIP EICAS MESSAGE. PILOT ABORTED  (N87BC)

All 1,098: https://openairdocs.org/jasc/7260/reports.md

## Other codes in chapter 72

- [JASC 7200](https://openairdocs.org/jasc/7200): Engine (Turbine/Turboprop) (14,712 reports)
- [JASC 7210](https://openairdocs.org/jasc/7210): Turbine Engine Reduction Gear (873 reports)
- [JASC 7220](https://openairdocs.org/jasc/7220): Turbine Engine Air Inlet Section (1,718 reports)
- [JASC 7230](https://openairdocs.org/jasc/7230): Turbine Engine Compressor Section (5,063 reports)
- [JASC 7240](https://openairdocs.org/jasc/7240): Turbine Engine Combustion Section (509 reports)
- [JASC 7250](https://openairdocs.org/jasc/7250): Turbine Section (3,623 reports)
- [JASC 7261](https://openairdocs.org/jasc/7261): Turbine Engine Oil System (5,122 reports)
- [JASC 7270](https://openairdocs.org/jasc/7270): Turbine Engine Bypass Section (65 reports)
- [JASC 7297](https://openairdocs.org/jasc/7297): Turbine Engine System Wiring (275 reports)

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