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A B737-200 in the process of deferring the left engine right inlet anti-ice valve and wiring it open per the MEL special procedures the engine fuel heat valve was inadvertently wired open causing high oil temperature in-flight.
| Attributes | |
| ACN | 406182 |
| Time | |
| Date | 199806 |
| Day | Fri |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : zzz |
| State Reference | US |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B737-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | other |
| Flight Plan | None |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : flight engineer |
| Experience | flight time last 90 days : 200 flight time total : 6900 flight time type : 1470 |
| ASRS Report | 406182 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 160 flight time total : 6500 flight time type : 1300 |
| ASRS Report | 406167 |
| Events | |
| Anomaly | aircraft equipment problem : critical non adherence : far non adherence : published procedure |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | none taken : detected after the fact |
| Consequence | Other |
| Supplementary | |
| Air Traffic Incident | other |
Narrative:
During ground time in ZZZ, us, mechanics were instructed to maintenance carry over an engine anti-ice valve and hard wire it open for flight. On the jt-8D-15A engine the engine anti-ice valve is located fairly close to the fuel heat valve. After takeoff the #1 engine was observed to have a higher oil temperature than #2. Subsequent troubleshooting indicated that the fuel heat valve was open in addition to the engine anti-ice valve that was failed open. No engine limitations were exceeded. The blue fuel heat 'valve open' light had one bulb illuminated but was not observed until well into the climb. Because fuel heat is prohibited to be on for takeoff/landing/go around and because the blue light does not stand out consideration should be given to tying the fuel heat valve open into the master caution recall system (that is checked before each takeoff/landing) or change the lens cover to a more visible color.
Original NASA ASRS Text
Title: A B737-200 IN THE PROCESS OF DEFERRING THE L ENG R INLET ANTI-ICE VALVE AND WIRING IT OPEN PER THE MEL SPECIAL PROCS THE ENG FUEL HEAT VALVE WAS INADVERTENTLY WIRED OPEN CAUSING HIGH OIL TEMP INFLT.
Narrative: DURING GND TIME IN ZZZ, US, MECHS WERE INSTRUCTED TO MAINT CARRY OVER AN ENG ANTI-ICE VALVE AND HARD WIRE IT OPEN FOR FLT. ON THE JT-8D-15A ENG THE ENG ANTI-ICE VALVE IS LOCATED FAIRLY CLOSE TO THE FUEL HEAT VALVE. AFTER TKOF THE #1 ENG WAS OBSERVED TO HAVE A HIGHER OIL TEMP THAN #2. SUBSEQUENT TROUBLESHOOTING INDICATED THAT THE FUEL HEAT VALVE WAS OPEN IN ADDITION TO THE ENG ANTI-ICE VALVE THAT WAS FAILED OPEN. NO ENG LIMITATIONS WERE EXCEEDED. THE BLUE FUEL HEAT 'VALVE OPEN' LIGHT HAD ONE BULB ILLUMINATED BUT WAS NOT OBSERVED UNTIL WELL INTO THE CLB. BECAUSE FUEL HEAT IS PROHIBITED TO BE ON FOR TKOF/LNDG/GAR AND BECAUSE THE BLUE LIGHT DOES NOT STAND OUT CONSIDERATION SHOULD BE GIVEN TO TYING THE FUEL HEAT VALVE OPEN INTO THE MASTER CAUTION RECALL SYS (THAT IS CHKED BEFORE EACH TKOF/LNDG) OR CHANGE THE LENS COVER TO A MORE VISIBLE COLOR.
Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.