# JASC 7333: Fuel Flow Sensor - Type: JASC system/component code (FAA) - ATA chapter: 73 Engine Fuel and Control - Title in the code table: FUEL FLOW SENSOR - Service difficulty reports: 80 - FAA code table: https://www.faa.gov/sites/faa.gov/files/JASC_Code.pdf#page=63 - Page: https://openairdocs.org/jasc/7333 ## What it covers The unit and associated circuitry and parts which senses and transmits the rate of fuel flow to the cockpit indicator. Typical parts are transmitter, sensor, fitting, connector, transducer, etc. ## Service difficulty reports (80, newest 50) - [SDR SWIA20241115027](https://openairdocs.org/sdr/SWIA20241115027), Oct 27, 2024: Emb ERJ170200LR. FMU. FAILED. AFTER ENGINE SHUTDOWN AT GATE EXCESSIVE AMOUNT OF SMOKE COMING FROM ENGINE 2 (FLIGHT 6490 - FILED CLOSED)PLEASE REFERENC (N521SY) - [SDR HALA2023050300100](https://openairdocs.org/sdr/HALA2023050300100), May 2, 2023: Airbus A330243. EEC. FAULTY. ETOPS - ENG 1 AND 2 EPR MODE FAULT, CONTINUED IN N1 MODE. MANUAL THRUST. REMOVED AND REPLACED EEC ON ENG 1.OPS CHECK GOO (N396HA) - [SDR YV3R2023042700560](https://openairdocs.org/sdr/YV3R2023042700560), Apr 12, 2023: Robsin R44. TIMER. DEFECTIVE. CUSTOMER REPORTED TIME DELAY ASSEMBLY, LOW FUEL P/N: G655-1 LOW FUEL INDICATION INOPERATIVE. - [SDR AALA202208114052](https://openairdocs.org/sdr/AALA202208114052), Aug 9, 2022: Boeing 100BOEING. TRANSMITTER. UNSERVICEABLE. AIRCRAFT WAS GROUNDED: RIGHT ENGINE FAILED ON CLIMB OUT. EMERGENCY DECLARED; FLIGHT RETURNED TO FCO LANDING SAFELY. **SU (N752AN) - [SDR SWIA202163091](https://openairdocs.org/sdr/SWIA202163091), Dec 11, 2021: Cndair CL6002B19. NONE. POWER LOSS. LEFT FUEL LO PRESS IN FLIGHT. LOST POWER. COULD NOT GET FUEL PRESSURE TO LEFT ENGINE. (FLIGHT 5424 - FILED CLOSED) THIS (N967SW) - [SDR YV3R2021092100495](https://openairdocs.org/sdr/YV3R2021092100495), Sep 16, 2021: Robsin R66. SENSOR. FAILED. CUSTOMER REPORTED SENSOR ASSEMBLY P/N: G768-11 FAILURE. - [SDR ASAA2020042732673](https://openairdocs.org/sdr/ASAA2020042732673), Apr 25, 2020: Boeing 737890. TRANSMITTER. LEAKING. #1 ENGINE FUEL FLOW TRANSMITTER LEAKING AT SHELL HOUSING OUTLET. GROUNDED - YES. REMOVED FUEL FLOW TRANSMITTER FROM #1 E (N570AS) - [SDR YV3R2019092400194](https://openairdocs.org/sdr/YV3R2019092400194), Sep 10, 2019: Robsin R66. FLOW SENSOR. INOPERATIVE. CUSTOMER REPORTED SENSOR ASSEMBLY P/N: G768-3 IS NOT WORKING. - [SDR YV3R2019092400193](https://openairdocs.org/sdr/YV3R2019092400193), Sep 10, 2019: Robsin R66. FLOW SENSOR. INOPERATIVE. CUSTOMER REPORTED SENSOR ASSEMBLY P/N: G768-3 IN NOT WORKING. - [SDR YV3R2019092400192](https://openairdocs.org/sdr/YV3R2019092400192), Sep 10, 2019: Robsin R66. FLOW SENSOR. INOPERATIVE. CUSTOMER REPORTED SENSOR ASSEMBLY P/N: G768-3 IS NOT WORKING. - [SDR ASAA2019020328024](https://openairdocs.org/sdr/ASAA2019020328024), Feb 3, 2019: Boeing 737890. TRANSMITTER. LEAKING. WHILE ACCOMPLISHING TC CMPT-72EO-O2O15-3, FOUND LEAK ON NR 1 ENGINE FUEL FLOW TRANSMITTER. GROUNDED - YES. REMOVED AND R (N596AS) - [SDR YV3R2019030500038](https://openairdocs.org/sdr/YV3R2019030500038), Feb 2, 2019: Robsin R66. FLOW SENSOR. INOPERATIVE. CUSTOMER REPORTED FLOW SENSOR P/N: G768-3 WAS INOPERATIVE. (N566MB) - [SDR ASAA2018013023336](https://openairdocs.org/sdr/ASAA2018013023336), Jan 30, 2018: Boeing 737890. TRANSMITTER. LEAKING. WHILE ACCOMPLISHING IDLE LEAK CK FOUND NR 1 ENG FUEL FLOW TRANSMITTER LEAKING AT THE SPLIT LINE. GROUNDED - YES. REPLACE (N577AS) - [SDR ASAA2017082521729](https://openairdocs.org/sdr/ASAA2017082521729), Aug 25, 2017: Boeing 737890. TRANSMITTER. LEAKING. WHILE ACCOMPLISHING IDLE LEAK CHECK ON #2 ENGINE FOUND FUEL FLOW TRANSMITTER LEAKING. GROUNDED - YES. REMOVED AND REPLAC (N593AS) - [SDR AALA20141022009](https://openairdocs.org/sdr/AALA20141022009), Oct 22, 2014: Boeing 767323. PRESSURE SWITCH. FAULTY. LEFT ENG FUEL FILTER CLOG LIGHT ILLUMINATED. EMER DECLARED FLIGHT RETURNED & LANDED WITHOUT INCIDENT. ACFT REMOVED FROM (N39356) - [SDR HNAA2013120900612](https://openairdocs.org/sdr/HNAA2013120900612), Dec 9, 2013: Dhav DHC8311. GAUGE. MALFUNCTIONED. NR 1 ENGINE FUEL TEMP INDICATOR PEGGED FULL HOT. R & R FUEL TEMP GAUGE AND GROUND RAN ACFT. OPS CHECKED GOOD. OK FOR SER (N328EN) - [SDR CA130416018](https://openairdocs.org/sdr/CA130416018), Apr 4, 2013: Bell 206L. SWITCH. LEAKING. (CAN) FUEL LEAKING FROM FUEL FLOW SWITCH. REPLACED WITH SERVICEABLE SWITCH. - [SDR UALA2012030101284](https://openairdocs.org/sdr/UALA2012030101284), Mar 1, 2012: Boeing 757222. TRANSMITTER. FAULTY. NR 2 ENG FUEL FLOW TRANS 5433-2, ESN 727259, NR 2 ENG FUEL FLOW TRANSMITTER IS NOT SENDING ACCURATE DATA (ECM SHIFT) ON (N533UA) - [SDR MASA2011040502329](https://openairdocs.org/sdr/MASA2011040502329), Apr 2, 2011: Cndair CL6002B19. TRANSMITTER. LEAKING. NR 2 ENGINE LEAK CHECK REQUIRED. MX C/W NR 2 ENGINE LEAK CHECKS, CORRECTED ONE LEAK AT FUEL FLOW TRANSMITTER RE-CHECK FO (N77302) - [SDR ASAA1057785](https://openairdocs.org/sdr/ASAA1057785), May 8, 2010: Boeing 737890. TRANSMITTER. FAILED. GE DIAGNOSTICS TREND DATA SHOWS NR 2 ENGINE FUEL FLOW DATA AGAIN IS TRENDING HIGHER THAN EXPECTED. ALL OTHER PARAMETERS (N579AS) - [SDR C2XA10CL045](https://openairdocs.org/sdr/C2XA10CL045), Mar 18, 2010: Emb EMB145XR. TRANSMITTER. FAULTY. IAH FLT 2124 - THE CREW REPORTED FUEL USED INDICATOR WAS NOT WORKING. THE AIRCRAFT DIVERTED INTO CLE AND LANDED WITHOUT (N12157) - [SDR AALA20100224ORD01](https://openairdocs.org/sdr/AALA20100224ORD01), Feb 24, 2010: Boeing 737823. SENSOR. MALFUNCTIONED. ORD - CREW REPORTED RIGHT ENGINE BEGAN TO SURGE ON CLIMBOUT. EMERGENCY DECLARED RETURNED ORD LANDED WITHOUT INCIDENT. AI (N820NN) - [SDR AALA20091214DFW03](https://openairdocs.org/sdr/AALA20091214DFW03), Dec 14, 2009: Boeing 777223. TRANSMITTER. LEAKING. AIRCRAFT AIR INTERRUPTED BACK TO DFW FOR REPORTED FUEL LEAK ON NUMBER ONE ENGINE. LANDED WITHOUT INCIDENT. FOUND FUEL LE (N775AN) - [SDR FDKA200703108](https://openairdocs.org/sdr/FDKA200703108), Mar 11, 2007: Emb EMB145LR. SENSOR. MALFUNCTIONED. FDM 6148 MCO-ATL (1020 PHX LCL). AIRCRAFT RETURNED TO THE FIELD FOR FUEL 2 LOW LEVEL MESSAGE IN FLIGHT. MX REMOVED AND R (N841MJ) - [SDR CA061120001](https://openairdocs.org/sdr/CA061120001), Nov 4, 2006: Bell 206L. SWITCH. LEAKING. (CAN) REMOVED LT FUEL FLOW SWITCH DUE TO LEAKING. INSTALLED FUEL FLOW SWITCH PN 205-061-635-005 SN 9607 (TC NR 200611200 - [SDR ASMF200607019](https://openairdocs.org/sdr/ASMF200607019), Jul 30, 2006: Boeing 737*. O-RING. LEAKING. DURING OVERNIGHT CHECK, A FUEL LEAK WAS DETECTED ON LT ENGINE. ENGINE WAS RUN AND LEAK WAS ON FUEL FLOW TRANSMITTER O-RI (N857AM) - [SDR 06FDEA1317](https://openairdocs.org/sdr/06FDEA1317), Apr 6, 2006: Boeing 727233. PRESSURE SWITCH. MALFUNCTIONED. AT FL350, AND FUEL TEMPERATURE 5, NR 2 FUEL ICING LIGHT ILLUMINATED. PERFORMED RELEVANT EMERG CK-LIST. DECLARED EMERGENC (N273FE) - [SDR CA060127003](https://openairdocs.org/sdr/CA060127003), Jan 19, 2006: Beech F90. INDICATOR. FAILED. (CAN) FUEL FLOW INDICATIONS WENT INTERMITTENT THEN FAILED IN FLIGHT. FOUND TRANSMITTER TO HAVE FAILED INTERNALLY. TIME O - [SDR CA051229002](https://openairdocs.org/sdr/CA051229002), Dec 26, 2005: Boeing 75728A. GOVERNOR. UNSERVICEABLE. DURING FLIGHT FROM YYC TO PVR, NR 2 ENGINE LOST PARTIAL POWER. FLIGHT CONTINUED WITHOUT INCIDENT. MAINTENANCE INVESTIGAT - [SDR 05FDEA00107](https://openairdocs.org/sdr/05FDEA00107), Jan 17, 2005: Airbus A300F4605R. FILTER. CLOGGED. TAKEOFF REJECTED AT 90 KTS FOR NR 1 FUEL ENG FUEL CLOG ECAM & WARNING. REMOVED AND REPLACED MAIN FUEL FILTER AS PER MM 7 (N654FE) - [SDR 05FDEA00098](https://openairdocs.org/sdr/05FDEA00098), Jan 16, 2005: Airbus A300F4605R. FUEL FILTER. CLOGGED. TAKEOFF REJECTED AT 90 KTS FOR NR 1 FUEL ENG FUEL CLOG ECAM & WARNING. REMOVED AND REPLACED MAIN FUEL FILTER AS PER MM 7 (N654FE) - [SDR CA040923005](https://openairdocs.org/sdr/CA040923005), Sep 17, 2004: Dorner DO328300. TRANSMITTER. CRACKED. (CAN) FUEL FLOW TRANSMITTER END CAP CRACKED WITH RESULTANT FUEL LEAKAGE INTO NACELLE. - [SDR P5CA0300982](https://openairdocs.org/sdr/P5CA0300982), Nov 7, 2003: Boeing 747200. CONNECTOR. DIRTY. ON PUSHBACK NR 3 ENG FUEL FLOW RESPONDED ERRATICALLY. CLEANED CONNECTOR ON FUEL FLOW TRANSMITTER, OPS NORMAL ON RELIABIL (N524UP) - [SDR 2003FA0000956](https://openairdocs.org/sdr/2003FA0000956), Sep 12, 2003: Beech F33A. TRANSDUCER. INTERMITTENT. DURING TAKE OFF POWER PILOT REPORTED THAT FUEL FLOW INDUCTION WENT TO 12GPH. UPON TROUBLESHOOTING OF THE FUEL SYSTEM MAI (N8252T) - [SDR 2003FA0000954](https://openairdocs.org/sdr/2003FA0000954), Sep 10, 2003: Beech F33A. TRANSDUCER. FAILED. FUEL FLOW WENT TO ZERO INDICATION IN FLT. TESTS SHOWED THAT HERTZ FLUCTUATED AND READ LOWER THAN PUBLISHED SPECIFICATION (N5585Y) - [SDR HEEA086530](https://openairdocs.org/sdr/HEEA086530), May 22, 2003: Skrsky S76A. INDICATOR. READS LOW. NR 1 FUEL FLOW INDICATOR READS LOW. (N762P) - [SDR 2003UALA00443](https://openairdocs.org/sdr/2003UALA00443), May 21, 2003: Boeing 737522. INDICATOR. MALFUNCTIONED. AIRCRAFT ABORTED TAKEOFF, AIRCRAFT SWERVED DURING THE TAKEOFF ROLL. CAUSE IS STILL TO BE DETERMINED. CREW ABORTED TAKEOF (N929UA) - [SDR GTIA030255](https://openairdocs.org/sdr/GTIA030255), Apr 14, 2003: Doug DC981. TRANSMITTER. FAILED. RSW - FLT 1504 - LEFT ENGINE HAD EXCESSIVE FUEL FLOW 5100 NR/HR AT CRUISE ALT 31,000 FEET DID QRH FOR HIGH FUEL FLOW. TR (N806NK) - [SDR GLBA2002207](https://openairdocs.org/sdr/GLBA2002207), Dec 20, 2002: Beech 1900D. METER. FAULTY. RIGHT FUEL FLOW INDICATOR INOP. REMOVED AND REPLACED FUEL FLOW METER, OPS CHECK GOOD. (N219GL) - [SDR C2XA02CL161](https://openairdocs.org/sdr/C2XA02CL161), Aug 5, 2002: Emb EMB145LR. TRANSMITTER. INOPERATIVE. CLE - FLIGHT 3171, THE CREW REPORTED THE NR 1 ENGINE FUEL FLOW INDICATION SHOWED 0 IN FLIGHT. THE ENGINE OPERATED NORMAL (N16951) - [SDR 2002FA0000763](https://openairdocs.org/sdr/2002FA0000763), Jun 15, 2002: Grob G120A. TRANSDUCER. FAILED. FUEL PRESSURE INDICATION WAS 75 PSI WITH THE ENGINE SHUT DOWN AND THE FUEL BOOST PUMP SHUT OFF. REMOVED TRANSDUCER AND I (N865AF) - [SDR 2002FA0000752](https://openairdocs.org/sdr/2002FA0000752), Jun 15, 2002: Grob G120A. TRANSDUCER. FAILED. AFTER START UP OF THE ENGINE THE FUEL FLOW INDICATION WENT TO ZERO. AIRCRAFT WAS TAKEN TO MAINTENANCE AND FOUND THAT IF (N865AF) - [SDR 2002FA0000766](https://openairdocs.org/sdr/2002FA0000766), Jun 12, 2002: Grob G120A. TRANSDUCER. LEAKING. FUEL FLOW INTERMITTENT WENT TO ZERO IN FLIGHT. ENGINE FUEL FLOW SYSTEM WAS INSPECTED AND FOUND THAT FUEL FLOW TRANSDUCER (N865AF) - [SDR DL73K020534](https://openairdocs.org/sdr/DL73K020534), May 11, 2002: Boeing 737232. CONNECTOR. DAMAGED. A/C RETURNED TO GATE DUE TO NR 2 FUEL FLOW INDICATION BEING ERRATIC. DISCONTINUED T/O AT 70 KTS - GW 117.0. NR 2 ENGINE (N315DL) - [SDR C2XA02CL042](https://openairdocs.org/sdr/C2XA02CL042), Feb 9, 2002: Emb EMB135ER. METER. INOPERATIVE. CLE FLIGHT 3061 THE CREW REPORTED THE NR 1 FUEL FLOW INDICATOR WAS INOPERATIVE. MAINTENANCE INSPECTED AND REPLACED THE N (N25504) - [SDR COMA0160910](https://openairdocs.org/sdr/COMA0160910), Nov 18, 2001: Cndair CL6002B19. TRANSDUCER. FAILED. FLIGHT 6075 RT FUEL FLOW INDICATION WENT TO ZERO DURING T/O. REPLACED THE RT ENGINE FUEL FLOW TRANSDUCER. (N920CA) - [SDR GLBA2001193](https://openairdocs.org/sdr/GLBA2001193), Sep 1, 2001: Beech 1900D. TRANSMITTER. FAULTY. LEFT FUEL FLOW FLUX ON T/O. REPLACED FUEL FLOW TRANSMITTER, OPS CHECKED SYSTEM SATISFACTORY. (N201YQ) - [SDR DHL2001717017](https://openairdocs.org/sdr/DHL2001717017), Jul 20, 2001: Boeing 72723. PACKING. DETERIORATED. NR 3 ENGINE FUEL FLOW INDICATES 1000PPH HIGHER THAN 1 AND 2 ENGINES. ALL OTHER ENGINE PARAMETERS NORMAL NR 3 POWER LEVER (N717DH) - [SDR C2XA01CL158](https://openairdocs.org/sdr/C2XA01CL158), Jul 1, 2001: Beech 1900D. TRANSMITTER. ERRATIC. CLE THE CREW REPORTED NR 1 FUEL FLOW GAUGE FLUCTUATES. MAINTENANCE REPLACED THE NR 1 ENGINE FUEL FLOW TRANSMITTER. OPERA (N69549) - [SDR GLBA2001120](https://openairdocs.org/sdr/GLBA2001120), Jun 7, 2001: Beech 1900D. TRANSMITTER. INOPERATIVE. NR 1 FUEL FLOW INDICATOR FAILED ON T/O ROLL. REPLACED FUEL FLOW TRANSMITTER. (N118UX) All 80: https://openairdocs.org/jasc/7333/reports.md ## Other codes in chapter 73 - [JASC 7300](https://openairdocs.org/jasc/7300): Engine Fuel and Control (465 reports) - [JASC 7310](https://openairdocs.org/jasc/7310): Engine Fuel Distribution (1,981 reports) - [JASC 7311](https://openairdocs.org/jasc/7311): Engine Fuel/Oil Cooler (226 reports) - [JASC 7312](https://openairdocs.org/jasc/7312): Fuel Heater (254 reports) - [JASC 7313](https://openairdocs.org/jasc/7313): Fuel Injector Nozzle (529 reports) - [JASC 7314](https://openairdocs.org/jasc/7314): Engine Fuel Pump (1,734 reports) - [JASC 7320](https://openairdocs.org/jasc/7320): Fuel Controlling System (4,390 reports) - [JASC 7321](https://openairdocs.org/jasc/7321): Fuel Control/Turbine Engines (2,878 reports) - [JASC 7322](https://openairdocs.org/jasc/7322): Fuel Control/Reciprocating Engines (1,272 reports) - [JASC 7323](https://openairdocs.org/jasc/7323): Turbine Governor (544 reports) - [JASC 7324](https://openairdocs.org/jasc/7324): Fuel Divider (74 reports) - [JASC 7330](https://openairdocs.org/jasc/7330): Engine Fuel Indicating System (407 reports) - [JASC 7331](https://openairdocs.org/jasc/7331): Fuel Flow Indicating (197 reports) - [JASC 7332](https://openairdocs.org/jasc/7332): Fuel Pressure Indicating (158 reports) - [JASC 7334](https://openairdocs.org/jasc/7334): Fuel Pressure Sensor (198 reports) - [JASC 7397](https://openairdocs.org/jasc/7397): Engine Fuel System Wiring (532 reports) --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). 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