# JASC 7930: Engine Oil Indicating System

- Type: JASC system/component code (FAA)
- ATA chapter: 79 Engine Oil
- Title in the code table: ENGINE OIL INDICATING SYSTEM
- Service difficulty reports: 1,286
- FAA code table: https://www.faa.gov/sites/faa.gov/files/JASC_Code.pdf#page=69
- Page: https://openairdocs.org/jasc/7930

## What it covers

For general reports of engine oil pressure, temperature and quantity and those reports with insufficient information to file in a more specific JASC 7900 series code. Includes oil filter bypass switch, chip detector light, indicators, etc.

## Service difficulty reports (1,286, newest 50)

- [SDR O9IA20260730167](https://openairdocs.org/sdr/O9IA20260730167), Jul 30, 2026: Cessna 510. OIL SYSTEM. MALFUNCTIONED. RT ENG OIL PRESSURE DROPPED TO 0 ON APPROACH INTO HIO FROM PAE. PRESSURE JUMPED UP INTO GREEN & SPIKED INTO RED & STAYED (N171AA)
- [SDR A6WA202607128900](https://openairdocs.org/sdr/A6WA202607128900), Jul 11, 2026: Cndair CL6002B19. HEAT EXCHANGER. FAULTED. DURING CLIMB-OUT AT CLIMB POWER NR 2 ENGINE OIL TEMP WAS 150 DEG AND SLOWLY CLIMBING. IT RETURNED TO THE GREEN WHEN POWE (N459AW)
- [SDR AALA202606245871](https://openairdocs.org/sdr/AALA202606245871), Jun 19, 2026: Airbus A321231. LINE. LEAKING. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT RETURNED TO LAS DUE THE FLIGHT CREW REPORTING THAT WHI (N995AN)
- [SDR DALA2026061503587](https://openairdocs.org/sdr/DALA2026061503587), Jun 14, 2026: Airbus BD5001A10. SENSOR. FAULTED. DIVERTED TO MKE DUE TO LT ENGINE LOW OIL PRESSURE MESSAGE. LOWEST OIL PRESSURE 61.5. NO OIL QTY LOSS OR OIL TEMP EXCEEDA (N138DU)
- [SDR 2026FA0000511](https://openairdocs.org/sdr/2026FA0000511), May 17, 2026: Lear 35A. DIPSTICK. WORN. NR 1 ENGINE OIL PRESSURE DROPPED PRECIPITOUSLY, PRECAUTIONARY SHUTDOWN PERFORMED (N441PC)
- [SDR DXTA2026050607904](https://openairdocs.org/sdr/DXTA2026050607904), May 3, 2026: Bombdr BD7001A11. PRESSURE SWITCH. FAILED. DURING TAKEOFF ROLL, AFTER APPLYING TAKEOFF POWER, BLUE CAS MESSAGE: L OIL FILTER MESSAGE ILLUMINATED. INITIATED ABORT.  (N124QS)
- [SDR BAGA2026042700005](https://openairdocs.org/sdr/BAGA2026042700005), Apr 24, 2026: Emb ERJ190100IGW. OIL SYSTEM. LOW PRESSURE. DURING FLIGHT ENGINE OIL 2 PRESSURE DECREASED WENT TO APPROX 20 RED INDICATION, RAN QRH AND SHUT ENGINE DOWN. NO FURTHER (N120BZ)
- [SDR ABXA20260127029](https://openairdocs.org/sdr/ABXA20260127029), Jan 27, 2026: Boeing 767381. OIL FILTER. FAULTED. DURING TAXI OUT RIGHT OIL FILTER MSG APPEARED, ACFT RETURNED TO GATE (BTB) AND MTX GROUNDED ACFT. REMOVED AND REPLACED T (N391CM)
- [SDR YENA2026011400035](https://openairdocs.org/sdr/YENA2026011400035), Jan 13, 2026: Airbus A321271NX. TRANSMITTER. FAULTED. FLT 034, CDG -BOS (ETOPS). NR 2 ENG OIL SENSOR ON 19.5 ON GROUND OUT OF PARIS THEN ONE HOUR INTO THE FLIGHT DROPPED TO 1 (N4022J)
- [SDR AALA202510288319](https://openairdocs.org/sdr/AALA202510288319), Oct 27, 2025: Airbus A319132. EIU. FAULTED. AIRCRAFT WAS GROUNDED: NUMBER 2 ENGINE SHOWED LOW PSI OCCASIONALLY DROPPING TO 0. AS PE,R CHECKLIST ALL OTHER INDICATION (N824AW)
- [SDR E0YA202511070001](https://openairdocs.org/sdr/E0YA202511070001), Oct 22, 2025: Cessna 560XL. INDICATION SYS. ERRATIC. OIL PRESSURE INDICATION ERATIC. SHUTDOWN ENGINE AS PRECAUTIONARY. (N719TT)
- [SDR DXTA2025092905103](https://openairdocs.org/sdr/DXTA2025092905103), Sep 26, 2025: Textrn TEXTRON700. ENGINE. FAULTED. ON INITIAL CLIMB OUT, OIL PRESS LOW L MASTER CAUTION OBSERVED. PRESSURE WENT DOWN TO 22-25 PSI. TEMP ROSE BUT NOT TO POI (N845QS)
- [SDR CALA2025091508880](https://openairdocs.org/sdr/CALA2025091508880), Sep 9, 2025: Boeing 777224. INDICATION SYS. INTERMITTENT. NR 2 ENGINE IS INDICATING INTERMITTENT OIL QUANTITY READINGS. NO FAULTS FOUND UNDER EXISTING FAULTS OR FAULT HISTORY REL (N78017)
- [SDR AALA202508263546](https://openairdocs.org/sdr/AALA202508263546), Aug 18, 2025: Airbus A321231. TRANSMITTER. FAULTED. AIRCRAFT WAS NOT GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT RETURNED TO DFW DUE TO THE FLIGHT CREW REPORTING T (N981UY)
- [SDR HALA20250818251](https://openairdocs.org/sdr/HALA20250818251), Aug 17, 2025: Airbus A330243. WARNING LIGHT. ILLUMINATED. ETOPS - ENGINE 1 OIL CHIP DETECT. PERFORMED DETAILED INSPECTION OF EMCD PER AMM 79-00-00-200-822-A. ACCEPTABLE LIMITS FO (N381HA)
- [SDR HALA20250505123](https://openairdocs.org/sdr/HALA20250505123), May 4, 2025: Airbus A330243. PUMP. FAULTED. ETOPS - ECAM APU FUEL LOW PRESSURE FAULT. REMOVED AND REPLACED AFT FUEL FEED PUMP IAW AMM 28-22-52-000-801-A AND 28-22-5 (N391HA)
- [SDR 2025FA0000317](https://openairdocs.org/sdr/2025FA0000317), Apr 25, 2025: Cirrus SR22T. SENSOR. ERRATIC. PILOT REPORTED LOW OIL PRESSURE CAS ANNUNCIATION OBSERVED IN FLIGHT AND RETURNED FOR LANDING. PERFORMED POST FLIGHT INSP (N321LL)
- [SDR ANCF20250424009](https://openairdocs.org/sdr/ANCF20250424009), Apr 24, 2025: Boeing 7878. OIL SYSTEM. LOW PRESSURE. ENG INFLIGHT SHUT DOWN DUE TO OIL QTY CERO AND LOW PRESS. ENG INFLIGHT SHUT DOWN DUE TO OIL QTY CERO AND LOW PRESS OIL E (N785AV)
- [SDR QMLA2025042520052](https://openairdocs.org/sdr/QMLA2025042520052), Apr 24, 2025: Bolkms BK117C2. ENGINE. MAKING METAL. #1 ENGINE CHIP LIGHT, REMOVED BOTH #1 ENGINE CHIP DETECTORS AND MAG PLUGS, CLEANED, INSPECTED, AND REINSTALLED. FUNCTION (N110HN)
- [SDR YENA2025041100387](https://openairdocs.org/sdr/YENA2025041100387), Apr 8, 2025: Airbus A321271NX. SENSOR. FAULTED. FLT#1908, CDG-JFK. (ETOPS) 'CONUS REST DUE TO ENG 2 OIL SENSOR FAULT REPAIRS ( AIRCRAFT TECHNICAL RESTRICTION (CONUS RES (N4048J)
- [SDR HALA20250328091](https://openairdocs.org/sdr/HALA20250328091), Mar 27, 2025: Airbus A321271N. SENSOR. FAULTED. ETOPS - ENG 1 OIL SYS FAULT AMBER ECAM MESSAGE POPULATED AT ENGINE SHUTDOWN. REMOVED & REPLACED #1 ENG MAIN OIL PRESS SE (N228HA)
- [SDR IPXA2025031314983](https://openairdocs.org/sdr/IPXA2025031314983), Mar 13, 2025: Airbus A300F4622R. INDICATION SYS. MALFUNCTIONED. *DIVERSION* ENG 2/ENGINE ADV LOW OIL PRESSURE (CONDITION BOTH OIL PRESSURE GAUGE AND ECAM NOT CONFIRMED BY OIL PRESSURE  (N125UP)
- [SDR YENA2025030500236](https://openairdocs.org/sdr/YENA2025030500236), Mar 4, 2025: Airbus A321271NX. SENSOR. FAULTED. FLT#688, LAX-BOS. (ETOPS) 'ENG 1 OIL SENSOR FAULT; REMOVED AND REPLACED #1 ENG PHMU. REF AMM 77-31-01. OPS CHECK NORMAL. (N2157J)
- [SDR U5QA202502240146](https://openairdocs.org/sdr/U5QA202502240146), Feb 14, 2025: Cessna 560XL. WARNING LIGHT. ILLUMINATED. LO OIL PRESS LIGHT R ANNUNCIATOR ILLUMINATED AND OIL PRESSURE TAPE SHOWING 0 IN FLIGHT. REMOVED & INSPECTED R ENG. OIL F (N264VR)
- [SDR JJBA20250127023](https://openairdocs.org/sdr/JJBA20250127023), Jan 25, 2025: Emb EMB145XR. OIL SYSTEM. OVERTEMP. E2 HIGH OIL TEMP. PERFORMED E2 SHUT DOWN. MAX E2 OIL TEMP 142C. PERFORMED BORESCOPE INSPECTION OF THE MID-SPAN ROLLER BE (N12195)
- [SDR HNAA2025012700072](https://openairdocs.org/sdr/HNAA2025012700072), Jan 24, 2025: Emb EMB145LR. ENGINE. MALFUNCTIONED. DURING T/O ROLL ENGINE 1 OIL PRESSURE WENT TO 170 PSI. E-1 HAD BEEN OPERATING AT LEAST 20 MINUTES AT THE TIME. DURATION  (N665BC)
- [SDR DALA2025012600632](https://openairdocs.org/sdr/DALA2025012600632), Jan 24, 2025: Airbus A321271NX. SENSOR. FALSE INDICATION. SHIP 5009 - ATB- ENROUTE TO CUN RECEIVED LEFT ENGINE OIL SYSTEM FAULT WITH ASSOCIATED FDGS AUX PUMP FAIL FAULT. CORRECTI (N509DT)
- [SDR DALA2025012100489](https://openairdocs.org/sdr/DALA2025012100489), Jan 20, 2025: Boeing 737832. TRANSMITTER. INOPERATIVE. SHIP 3758 -DIV- DIVERSION TO GEG FOR A LEFT ENGINE OIL FILTER BYPASS MESSAGE. CORRECTIVE ACTION: INSPECTED MCD AND SUPPL (N3758Y)
- [SDR YENA2025011000036](https://openairdocs.org/sdr/YENA2025011000036), Jan 9, 2025: Airbus A321271NX. METERING UNIT. FAULTED. FLT#511, JFK-LAS. (ETOPS). 'AFTER ENGINE START ENG 2 MINOR FAULT ( MINOR FAULT CAUTIONS ON ECAM EWD ); PERFORMED WIRING  (N4074J)
- [SDR HALA20241203348](https://openairdocs.org/sdr/HALA20241203348), Dec 2, 2024: Airbus A330243. CHIP DETECTOR. FALSE INDICATION. ETOPS - AFTER LANDING ECAM ENG 1 OIL CHIP DETECTED. INSPECTED ENGINE #1 MCD PER AMM 79-00-00-200-806-A. FOUND NO EVIDENC (N360HA)
- [SDR 3EJA202411130022](https://openairdocs.org/sdr/3EJA202411130022), Nov 12, 2024: Cessna 560XL. OIL SYSTEM. LOW PRESSURE. MASTER WARNING OIL PRESSURE LOW. OIL PRESSURE READING 0. LH ENGINE (N845JS)
- [SDR HALA20241112323](https://openairdocs.org/sdr/HALA20241112323), Nov 11, 2024: Airbus A330243. CHIP DETECTOR. FALSE INDICATION. ETOPS-REPEAT WRITE UP AFTER LANDING ECAM ENG 1 OIL CHIP DETECTED. PERFORMED TSM 79-20-00-810, FOUND DAMAGED PIN ON EMCD. (N386HA)
- [SDR YENA2024110601439](https://openairdocs.org/sdr/YENA2024110601439), Nov 3, 2024: Airbus A321231. OIL COOLER. FAILED. FLT#448, LAS-JFK. (AIRCRAFT DECLARED AN EMERGENCY INTO JFK) 'ENG 1 OIL QTY ADV MSG DURING FLT QTY SHOWED 3.5 AT LOWEST P (N923JB)
- [SDR L5YA2024100400001](https://openairdocs.org/sdr/L5YA2024100400001), Sep 28, 2024: Cessna 525B. TRANSMITTER. FALSE INDICATION. AT TAKE OFF PILOT REPORTED R/H ENGINE HAD ERRATIC OIL PRESSURE AIRCRAFT DIVERTED TO KSAN . TROUBLESHOT R/H ENGINE TO FAU (N415P)
- [SDR AALA202409278538](https://openairdocs.org/sdr/AALA202409278538), Sep 26, 2024: Airbus A321231. INDICATION SYS. UNKNOWN. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT DIVERTED TO MEM DUE TO LEFT ENGINE LOW OIL PRESSURE AN (N915US)
- [SDR YENA2024091301269](https://openairdocs.org/sdr/YENA2024091301269), Sep 12, 2024: Airbus A321271NX. SENSOR. FAULTED. FLT#34, CDG-BOS. (ETOPS) 'ENG 1 OIL SENSOR FAULT ON GROUND; REMOVED AND REPLACED ENG #1 PHMU PER AMM 77-31-01. ENG IDLE  (N4076J)
- [SDR DALA2024082708498](https://openairdocs.org/sdr/DALA2024082708498), Aug 25, 2024: Boeing 757251. INDICATOR. FAULTED. SHIP 5654 -ATB/DE- RETURNED TO ATL FOR RIGHT ENGINE OIL QTY INDICATED ZERO WITH NORMAL OIL PRESSURE AND TEMPERATURE. COR (N554NW)
- [SDR 2024FA0000632](https://openairdocs.org/sdr/2024FA0000632), Aug 23, 2024: Piper PA46350P. TRANSDUCER. FAILED. IN LATE JUNE 2023 AFTER LANDING AT WICK SCOTLAND ON A TRANSATLANTIC OUR FERRY PILOT NOTICED A SUBSTANTIAL AMOUNT OF OIL  (N415X)
- [SDR GTIA2024082038321](https://openairdocs.org/sdr/GTIA2024082038321), Aug 18, 2024: Airbus A320271N. O-RING. DAMAGED. NO.1 ENGINE OIL INDICATOR SHOWING 0 QUARTS IN FLIGHT. -FOUND O-RING ON IFPC ENG 1 SHAFT CUT. REMOVED AND REPLACED O-RING (N981NK)
- [SDR HALA20240805211](https://openairdocs.org/sdr/HALA20240805211), Aug 3, 2024: Airbus A330243. WARNING LIGHT. FALSE ACTIVATION. ETOPS - OIL CHIP ENG 1 DETECTED ON LANDING. PERFORMED TSM 79-20-00-810-823-A. NO DEFECTS NOTED. REMOVED, INSPECTED AND R (N360HA)
- [SDR YENA2024071601000](https://openairdocs.org/sdr/YENA2024071601000), Jul 14, 2024: Airbus A321231. VALVE. FAILED. FLT#373, BOS-AUA. (AIRCRAFT PERFORMED AN AIR TURN BACK TO BOS). 'ENG 2 BEARING 4 OIL SYS HI PRESSURE (2ND WRITE UP); REM (N973JT)
- [SDR CALA2024062400069](https://openairdocs.org/sdr/CALA2024062400069), Jun 21, 2024: Boeing 767322. CHIP DETECTOR. MISSING. #2 ENGINE MAGNETIC CHIP DETECTORS (MCD) INSPECTION {B767-72-3-7011} - COMPT NO.4 MCD FOUND MISSING ON INSP SDR AND MATER (N675UA)
- [SDR CALA2024062400063](https://openairdocs.org/sdr/CALA2024062400063), Jun 19, 2024: Boeing 7379. SENSOR. CONTAMINATED. NR 1 ENG SHOWS AN OIL SYSTEM CHIP COUNT INCREASE. INSPECTED ODMS SENSOR PER AMM 79-00-00-210-804-G00, ALL SCAVENGE SCREE (N37542)
- [SDR AALA202406215803](https://openairdocs.org/sdr/AALA202406215803), Jun 12, 2024: Airbus A319112. CONCENTRATOR. INOPERATIVE. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT DIVERTED TO PWM DUE TO THE FLIGHT CREW REPORTING THAT  (N757UW)
- [SDR AALA202406215548](https://openairdocs.org/sdr/AALA202406215548), Jun 12, 2024: Airbus A319112. CONCENTRATOR. INOPERATIVE. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT DIVERTED TO PWM DUE TO THE FLIGHT CREW REPORTING THAT  (N757UW)
- [SDR HNAA2024051500393](https://openairdocs.org/sdr/HNAA2024051500393), May 14, 2024: Emb EMB145LR. SENSOR. FAULTED. HIGH OIL TEMP DISPLAYED IN CLIMB SETTINGS ON NUMBER 1 ENG FACT 14MAY24 13:49 PHL R/R E1 OIL PRESSURE/TEMP TRANSDUCER SEN (N925AE)
- [SDR HALA20240415098](https://openairdocs.org/sdr/HALA20240415098), Apr 14, 2024: Airbus A330243. LINE. LEAKING. ETOPS - FOUND #1 ENG OIL PRESSURE TRANSMITTER (4060KS2) BRAIDED OIL LINE LEAKING. REMOVED AND REPLACED LINE P/N: AE71131 (N399HA)
- [SDR GTIA2024040938057](https://openairdocs.org/sdr/GTIA2024040938057), Apr 8, 2024: Airbus A319132. TRANSDUCER. FAULTY. ENGI 2 OIL PRESS LO ECAM OIL PRESS ZERO-R&R PRESSURE TRANSDUCER IAW AMM 79-33-15 LEAK CHECK GOOD NO FAULTS FOUND AT THIS (N526NK)
- [SDR AALA202404298082](https://openairdocs.org/sdr/AALA202404298082), Mar 6, 2024: Airbus A319112. ENGINE. LEAKING. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT RETURNED TO ORD DUE TO THE FLIGHT CREW REPORTING THAT  (N704US)
- [SDR HALA20240226052](https://openairdocs.org/sdr/HALA20240226052), Feb 25, 2024: Airbus A321271N. SENSOR. FAULTED. ETOPS - ECAM ENG2 OIL SENSOR FAULT. REMOVED AND REPLACED PHMU PER AMM 77-31-01. AND TROUBLESHOT PER TSM 79-35-00-810-806 (N217HA)

All 1,286: https://openairdocs.org/jasc/7930/reports.md

## Other codes in chapter 79

- [JASC 7900](https://openairdocs.org/jasc/7900): Engine Oil System (Airframe Furnished) (260 reports)
- [JASC 7910](https://openairdocs.org/jasc/7910): Engine Oil Storage (Airframe Furnished) (204 reports)
- [JASC 7920](https://openairdocs.org/jasc/7920): Engine Oil Distribution (Airframe Furnished) (734 reports)
- [JASC 7921](https://openairdocs.org/jasc/7921): Engine Oil Cooler (982 reports)
- [JASC 7922](https://openairdocs.org/jasc/7922): Engine Oil Temperature Regulator (268 reports)
- [JASC 7923](https://openairdocs.org/jasc/7923): Engine Oil Shutoff Valve (25 reports)
- [JASC 7931](https://openairdocs.org/jasc/7931): Engine Oil Pressure (1,875 reports)
- [JASC 7932](https://openairdocs.org/jasc/7932): Engine Oil Quantity (217 reports)
- [JASC 7933](https://openairdocs.org/jasc/7933): Engine Oil Temperature (499 reports)
- [JASC 7997](https://openairdocs.org/jasc/7997): Engine Oil System Wiring (236 reports)

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