# JASC 7931: Engine Oil Pressure

- Type: JASC system/component code (FAA)
- ATA chapter: 79 Engine Oil
- Title in the code table: ENGINE OIL PRESSURE
- Service difficulty reports: 1,875
- FAA code table: https://www.faa.gov/sites/faa.gov/files/JASC_Code.pdf#page=69
- Page: https://openairdocs.org/jasc/7931

## What it covers

The instrument or warning lamp which indicates, senses, or transmits the pressure of engine lubricating oil available at the engine or when the pressure is improper for the conditions. This code is also used for discrepancies invloving oil pressure regulation. Typical parts are transducer, pressure switch, transmitter, pressure regulator, indicator, case, dial, needle, lamp, etc.

## Service difficulty reports (1,875, newest 50)

- [SDR CALA2026101920471](https://openairdocs.org/sdr/CALA2026101920471), Oct 16, 2026: Boeing 757224. TRANSMITTER. FAULTED. OIL PRESSURE INDICATING SYSTEM OIL PRESSURE (01=L ENG, 02=R ENG) READS PSI WITH ENGINE SHUT DOWN ENG 2 OIL HIGH PRESSURE (N14115)
- [SDR SWAA2026101985298](https://openairdocs.org/sdr/SWAA2026101985298), Oct 13, 2026: Boeing 7378H4. OIL SYSTEM. LOW PRESSURE. OIL QUANTITY ZERO. OIL PRESSURE DROP TO RED BOX SHUT DOWN ENG 2. EMER DECLARED, TRUCKS ROLLED. PASSENGERS WERE FINE. R & (N8517F)
- [SDR N6WA2026101503](https://openairdocs.org/sdr/N6WA2026101503), Oct 13, 2026: Cndair CL6002C11. PRESSURE SWITCH. FAULTED. RIGHT ENG OIL WARNING 26 K FT WITH PARAMETERS BOUNCING OIL QTY 87-79%, 61 TO 64 PSI AND TEMP 101 TO 104C. DEFERRED RT LO (N526GJ)
- [SDR N6WA2026101502](https://openairdocs.org/sdr/N6WA2026101502), Oct 9, 2026: Cndair CL6002C11. PRESSURE SWITCH. FAULTED. R ENG OIL PRESSURE WARNING MESSAGE IN FLIGHT (B1-007482 R OIL LO PRES SW / LO PRESS & ENG RUNNING). REMOVED AND R ENG OI (N566GJ)
- [SDR QMLA2026061320038](https://openairdocs.org/sdr/QMLA2026061320038), Jun 11, 2026: Bell 407. OIL SYSTEM. LOW PRESSURE. UPON INITIATION OF VISUAL APPROACH, THE CREW ALERTING SYSTEM DISPLAYED AN ENGINE OIL PSI WARNING. ADJUSTED OIL PRESSURE, (N159AM)
- [SDR AALA202605133614](https://openairdocs.org/sdr/AALA202605133614), May 12, 2026: Airbus A321231. PUMP. LOW PRESSURE. AIRCRAFT WAS NOT GROUNDED: AN EMERGENCY WAS DECLARED AND THE ACFT RETURNED TO LAX DUE TO THE FLT CREW REPORTING THAT AT  (N115NN)
- [SDR QREA202607070001](https://openairdocs.org/sdr/QREA202607070001), May 1, 2026: Cessna 525B. PRESSURE SWITCH. STUCK. RIGHT ENGINE OIL PRESSURE LOW WARNING- OIL PRESSURE SWITCH STUCK IN THE OIL PRESSURE ZERO POSITION (N971TB)
- [SDR OEJ202604300001](https://openairdocs.org/sdr/OEJ202604300001), Apr 28, 2026: Lear 45LEAR. OIL SYSTEM. LOW PRESSURE. AFTER 45 MINUTES OF FLIGHT THE CREW NOTINED THE RIGHT ENGINE OIL PRESSURE WAS ERRATIC AND FLUXUATING , THEN AN ENGINE LO (N618PJ)
- [SDR A6WA202604138885](https://openairdocs.org/sdr/A6WA202604138885), Apr 13, 2026: Cndair CL6002B19. OIL SYSTEM. LOW PRESSURE. RECEIVED RIGHT ENGINE OIL PRESSURE WARNING AT 1000 FEET ON FINAL FULLY CONFIGURED OIL PRESSURE WAS APPROX. 30-35PSI AT 8 (N442AW)
- [SDR QR9R2026040900001](https://openairdocs.org/sdr/QR9R2026040900001), Apr 9, 2026: Bolkms BK117C2. TRANSMITTER. FAILED. #2 ENGINE OIL PRESSURE DURING START RUN-UP. DURING TEST FLIGHT EVAL FOR NO #2 ENGINE OIL PRESSURE, FOUND DURING VENTING 
- [SDR ABXA20260404148](https://openairdocs.org/sdr/ABXA20260404148), Apr 4, 2026: Boeing 767223. WARNING MESSAGE. ILLUMINATED. DURING TAXI OUT, LEFT ENGINE OIL PRESS ILLUMINATED. A/C RETURNED TO GATE. (BTB) MAINTENANCE DEFERRED IAW ABX-79-33-1-1.  (N312AA)
- [SDR 2026FA0000348](https://openairdocs.org/sdr/2026FA0000348), Apr 2, 2026: Agusta AW109SP. PRESSURE SENSOR. MALFUNCTIONED. PILOT REPORTED HIGH OIL PRESSURE, SECURED THE ENGINE IN FLIGHT AND PREFORMED A PRECAUTIONARY LANDING. (N281HC)
- [SDR DALA2026040302148](https://openairdocs.org/sdr/DALA2026040302148), Mar 31, 2026: Airbus A350941. OIL SYSTEM. LOW PRESSURE. AIRCRAFT DIVERTED TO ANF (ANTOFAGASTA, CHILE) AFTER THE FLIGHT CREW PERFORMED A RIGHT ENGINE SHUTDOWN DUE TO LOW OIL PRE (N513DZ)
- [SDR UIEA2026032800112](https://openairdocs.org/sdr/UIEA2026032800112), Mar 28, 2026: Boeing 7474J6. INDICATION SYS. FAULTED. ENGINE NR 3 OIL PRESSURE WENT TO ZERO. EICAS ENG 3 OIL PRESS, RAN QRH CHKLIST WHICH READ ENGINE SHUTDOWN. TEMP WAS 95 &  (N747BC)
- [SDR AALA202603137358](https://openairdocs.org/sdr/AALA202603137358), Mar 12, 2026: Airbus A321231. INTERFACE UNIT. FAULTY. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT RETURNED TO DFW DUE TO THE FLIGHT CREW REPORTING THAT  (N995AN)
- [SDR CALA2026022314020](https://openairdocs.org/sdr/CALA2026022314020), Feb 19, 2026: Airbus A320232. PACKING. DAMAGED. RIGHT ENGINE OIL TEMP FLASHING AMBER ON CLMB AT 155-160 DEG. FL270. OIL PRESSURE 170 COMPR INSPECTED MASTER CHIP DETECTO (N464UA)
- [SDR YENA2026020600155](https://openairdocs.org/sdr/YENA2026020600155), Feb 5, 2026: Airbus A321271NX. SENSOR. FAILED. FLT 424, LAX- JFK (ETOPS). DURING ENGINE NR 1 RUN OIL PRESSURE WENT AMBER XX, REMOVED AND REPLACED ENGINE NR1 MOP SENSOR (N4076J)
- [SDR SIMA20260126001](https://openairdocs.org/sdr/SIMA20260126001), Jan 26, 2026: Emb ERJ170200LR. OIL SYSTEM. LOW PRESSURE. NR 1 ENGINE LOW PRESSURE DURING DESCENT, QUICKLY LOSING OIL PRESSURE. MANUAL SHUTDOWN IAW QRH. PRECAUTIONARY ENG 1 SHUT  (N208AN)
- [SDR 2026F00006](https://openairdocs.org/sdr/2026F00006), Jan 24, 2026: Lear 60LEAR. ENGINE. MALFUNCTIONED. ON 1/24/2026 N662AR, CYO662 WAS DEPARTING KSUA HEADING TO KNAS. DURING CLIMB, THE CAPTAIN NOTICED THE LH ENGINE OIL PRES (N662AR)
- [SDR ABXA20260124027](https://openairdocs.org/sdr/ABXA20260124027), Jan 24, 2026: Boeing 767338. PRESSURE SWITCH. MALFUNCTIONED. AFTER STARTING ENGINES DURING TAXI R OIL FILTER MSG CAME UP A/C RETURNED TO THE GATE AND MTX GROUNDED A/C . MTX REPLACED (N363CM)
- [SDR 141A2026011200001](https://openairdocs.org/sdr/141A2026011200001), Jan 10, 2026: Cessna 208B. TRANSDUCER. FAILED. THIS IS REPO FLIGHT FROM HNL TO OGG. ABOUT 5 MINUTE AFTER TAKEOFF FROM HNL, OIL PRESSURE INDICATION DROP DOWN YELLOW AND (N592SA)
- [SDR DXTA2026010606416](https://openairdocs.org/sdr/DXTA2026010606416), Jan 3, 2026: Bombdr BD7001A12. CONTROL VALVE. FAULTED. SIX HOURS INTO THE FLIGHT R ENG OIL FILTER CAS MESSAGE DISPLAYED FOLLOWED R ENG OIL LOW PRESS CAS MESSAGE. OIL PRESSURE  (N182QS)
- [SDR DALA2025122909481](https://openairdocs.org/sdr/DALA2025122909481), Dec 25, 2025: Boeing 757351. OIL SYSTEM. LOW PRESSURE. ATB/IFSD/DE - AIRCRAFT RETURNED TO DTW DUE TO RIGHT ENGINE IFSD DUE TO ZERO OIL PRESSURE AND OIL QUANTITY. RIGHT ENGINE  (N585NW)
- [SDR SWIA2025121800017](https://openairdocs.org/sdr/SWIA2025121800017), Dec 17, 2025: Cndair CL6002C10. WARNING MESSAGE. ILLUMINATED. RIGHT ENGINE OIL PRESSURE WARNING MESSAGE IN FLIGHT. LEAD TO LOSS OF ENGINE INFLIGHT HAD TO RETURN TO TUS SINGLE ENGINE  (N797SK)
- [SDR ABXA20251215343](https://openairdocs.org/sdr/ABXA20251215343), Dec 15, 2025: Boeing 767231. PRESSURE SWITCH. DEFECTIVE. ON TAXI OUT, LT ENGINE OIL FILTER STATUS MESSAGE ILLUMINATED. AIRCRAFT RETURNED TO BLOCKS (BTB). MAINTENANCE REMOVED AND (N650GT)
- [SDR HNAA2025121500857](https://openairdocs.org/sdr/HNAA2025121500857), Dec 13, 2025: Emb EMB145LR. OIL SYSTEM. HIGH PRESSURE. NUMBER 1 ENGINE OIL PRESS REMAINS ABOVE 119 TO 120 PSI UNTIL POWER IS REDUDCED. R & R NR 1 ENGINE IAW WORKCARD. 71-00-00 (N637AE)
- [SDR DALA2025120308836](https://openairdocs.org/sdr/DALA2025120308836), Nov 25, 2025: Boeing 767332. OIL SYSTEM. LOW PRESSURE. DIV/IFSD- DIVERTED TO LAX DUE TO RIGHT ENGINE OIL PRESSURE LOSS. ENGINE OPERATED AT ZERO OIL PRESSURE. REPLACED NUMBER 2 (N190DN)
- [SDR I5PA2025111688801](https://openairdocs.org/sdr/I5PA2025111688801), Nov 16, 2025: Boeing 757230. OIL SYSTEM. LOW PRESSURE. MGE305 (N888LT) DECLARED AN EMERGENCY DUE TO LOSS OF OIL QUANTITY AND PRESSURE ON THE LEFT ENGINE JUST PRIOR TO TOP OF D (N888LT)
- [SDR DALA2025101607562](https://openairdocs.org/sdr/DALA2025101607562), Oct 15, 2025: Airbus A320212. OIL SYSTEM. LOW PRESSURE. RETURNED TO SLC DUE TO LEFT ENGINE LOW OIL PRESSURE AND ENGINE WAS SHUT DOWN. ENGINE CHANGE REQUIRED DUE TO ENGINE OPERA (N336NW)
- [SDR HALA20251001295](https://openairdocs.org/sdr/HALA20251001295), Sep 30, 2025: Airbus A321271N. SENSOR. FAULTED. ETOPS - ENG2 OIL SENSOR FAULT MESSAGE FLASHED SPORADICALLY DURING CRUISE. REPLACED PHMU PER AMM 77-31-01 ON RH ENGINE. P (N216HA)
- [SDR YENA2025090800916](https://openairdocs.org/sdr/YENA2025090800916), Sep 4, 2025: Airbus A320232. TRANSMITTER. FAILED. FLT#1890, SHU-EWR. (AN EMERGENCY WAS DECLARED) "FL340 IN CRUISE ECAM ENG 1 OIL LO PR AMBER INDICATION. FROM 0 TO 224 FLU (N636JB)
- [SDR HALA20250825260](https://openairdocs.org/sdr/HALA20250825260), Aug 22, 2025: Airbus A330343. PRESSURE SWITCH. FAULTED. ETOPS - AFTER ENG 1 START ECAM A ICE L(R) WSHLD HEAT A ICE CAPT FO STBY PITOT HEAT. REMOVED & REPLACED LOW OIL PRESSURE  (N5827K)
- [SDR AALA202508200259](https://openairdocs.org/sdr/AALA202508200259), Aug 19, 2025: Boeing 737823. PRESSURE SWITCH. FAILED. AIRCRAFT WAS GROUNDED. AN EMERGENCY WAS DECLARED DUE TO: AFTER TAKEOFF THROUGH APPROXIMATELY 3000FT, GOT NUMBER 1 ENGINE (N879NN)
- [SDR MTNA20250813001](https://openairdocs.org/sdr/MTNA20250813001), Aug 12, 2025: Aerosp ATR42300. WARNING LIGHT. ILLUMINATED. ON THE TAKEOFF ROLL, BELOW V1, ENGINE OIL LOW PRESSURE MASTER WARNING ILLUMINATED EXTINGUISHED THEN ILLUMINATED AGAIN TA (N910FX)
- [SDR AALA202508058997](https://openairdocs.org/sdr/AALA202508058997), Aug 3, 2025: Boeing 737823. SCREEN. UNSECURE. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: DURING CLIMBING THRU FL220 ENGINE NUMBER 1 OIL INDICATED 3Q, OI (N337PJ)
- [SDR 2025F00171](https://openairdocs.org/sdr/2025F00171), Jul 31, 2025: Beech B90. OIL SYSTEM. LOW PRESSURE. DEPARTED GYH-ADS, AT FL180 PILOT NOTED SPARKS BY THE RT ENGINE AND THEN THE OIL PRESSURE WARNING LIGHT ACTIVATED AND PRE (N176TW)
- [SDR DALA2025071505335](https://openairdocs.org/sdr/DALA2025071505335), Jul 14, 2025: Boeing 767332. SWITCH. FAULTED. SHIP 0190 RECEIVED RT OIL PRESSURE LIGHT AND EICAS. R & R SWITCH S1584 RT OIL PRESSURE INSPECT CONNECTOR PLUG AND WIRING (N190DN)
- [SDR NACA2025070300002](https://openairdocs.org/sdr/NACA2025070300002), Jul 3, 2025: Boeing 7673BG. INDICATOR. INOPERATIVE. RH ENGINE OIL PRESS IND BLANK. CLEANED AND RESECURED ELECTRICAL CONNECTOR P4208P IAW WPM 36-11-62 OPS CHECK OK. (N566NC)
- [SDR CALA2025070706280](https://openairdocs.org/sdr/CALA2025070706280), Jul 3, 2025: Boeing 757224. TRANSMITTER. FAULTY. LEFT OIL PRESS WENT DOWN TO 36 PSI OVER AN HOUR AT FL350 AN HO UR AFTER T /O. RTB FOR POSS S/E CREW REPORTS THAT OIL PRE (N14121)
- [SDR AALA202506306224](https://openairdocs.org/sdr/AALA202506306224), Jun 28, 2025: Boeing 737823. OIL SYSTEM. LOW PRESSURE. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: INFLIGHT ENGINE SHUTDOWN DUE TO LOW OIL PRESSURE ON NUMBER 1 EN (N938NN)
- [SDR 2025FA0000384](https://openairdocs.org/sdr/2025FA0000384), Jun 4, 2025: Cessna 172S. INDICATION SYS. ERRATIC. ENGINE OIL PRESSURE INDICATION ERRATIC. ONLY FLUCTUATES IN FLIGHT. STEADY DURING GROUND OPERATIONS. (N717TH)
- [SDR YENA2025060200549](https://openairdocs.org/sdr/YENA2025060200549), May 30, 2025: Airbus A321271NX. SENSOR. FAILED. FLT#34, CDG-BOS. (ETOPS). 'MAINTENANCE ENG 1 FADEC ON SHUTDOWN; REMOVED AND REPLACED MAIN OIL PRESSURE SENSOR IAW AMM 79 (N4062J)
- [SDR CALA2025051304651](https://openairdocs.org/sdr/CALA2025051304651), May 11, 2025: Boeing 777224. ENGINE. OIL CONSUMPTION. E1 ESN 900511 HAS EXPERIENCED AN INCREASE IN OIL CONSUMPTION. PL EASE ACCOMPLISH A SNIFF CHECK OF THE OIL FOR FUEL SMELL (N79011)
- [SDR 3EJA202505070001](https://openairdocs.org/sdr/3EJA202505070001), May 7, 2025: Bombdr BD1001A10. OIL SYSTEM. LOW PRESSURE. RH ENG LOW OIL PRESSURE INTERMITTENT DURING CLIMB OUT. (N393JS)
- [SDR AALA202505081851](https://openairdocs.org/sdr/AALA202505081851), May 4, 2025: Boeing 7378. OIL SYSTEM. LOW PRESSURE. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: NUMBER 2 ENGINE OIL QUANTITY AND PRESSURE WENT TO AMBER THEN RE (N324RA)
- [SDR CALA2025022802517](https://openairdocs.org/sdr/CALA2025022802517), Feb 28, 2025: Boeing 757224. PUMP. FAILED. ZERO OIL PRESSURE INDICATED AND LOW OIL PRESSURE LIGHT ON TAKEOF F ROLLCREW DEBRIEF. CREW STATED THE PRESS WENT TO 0 WIT (N48127)
- [SDR HALA20250226072](https://openairdocs.org/sdr/HALA20250226072), Feb 25, 2025: Airbus A321271N. PRESSURE SENSOR. FAULTED. ETOPS - FOUND OIL PRESSURE DIFFERENTIAL SENSOR BAD PER TASKCARD 321-730000-WI-1 W/O 335093 FIN- 4077KS. REMOVED AND REPL (N217HA)
- [SDR FXTA20250408003](https://openairdocs.org/sdr/FXTA20250408003), Feb 14, 2025: Textrn 408. PRESSURE SWITCH. LOOSE. FOUND LH ENGINE OIL LOW PRESSURE SWITCH LOOSE IN BOSS. (N409BA)
- [SDR AALA202501279832](https://openairdocs.org/sdr/AALA202501279832), Jan 26, 2025: Boeing 737823. OIL SYSTEM. FLUCTUATES. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: AT FL390, N1 AROUND 89%. REVERSE VIDEO INDICATION APPEARED ON L (N923NN)
- [SDR SWIA2025011400011](https://openairdocs.org/sdr/SWIA2025011400011), Jan 14, 2025: Cndair CL6002B19. WARNING MESSAGE. ILLUMINATED. L ENG OIL PRESS WARNING MESSAGE CLIMBING OUT. OIL PRESSURE WAS IN RED INDICATION. RAN QRH AND SHUTDOWN ENGINE. MESSAGE P (N969SW)

All 1,875: https://openairdocs.org/jasc/7931/reports.md

## Other codes in chapter 79

- [JASC 7900](https://openairdocs.org/jasc/7900): Engine Oil System (Airframe Furnished) (261 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 7930](https://openairdocs.org/jasc/7930): Engine Oil Indicating System (1,286 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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