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B737-500 operating with a deferred right pneumatic system rejects a takeoff for a right wing body overheat warning. Reach agreement with maintenance that it is a sensor issue and complete the flight.
| Attributes | |
| ACN | 781155 |
| Time | |
| Date | 200804 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B737-300 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : takeoff roll |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain observation : company check pilot oversight : pic |
| Experience | flight time last 90 days : 240 flight time total : 2100 flight time type : 10200 |
| ASRS Report | 781155 |
| Events | |
| Anomaly | aircraft equipment problem : less severe |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : overcame equipment problem flight crew : rejected takeoff |
| Consequence | other |
| Supplementary | |
| Problem Areas | Aircraft |
| Primary Problem | Aircraft |
Narrative:
Before departure; right wing body overheat light was deferred due to a bad sensor. In compliance with the MEL; the isolation; right pack; and right engine bleed valves were closed. No problems were encountered on the flight from ZZZ1 to ZZZ. On the takeoff roll from ZZZ to ZZZ1 just before 80 KTS the master caution light illuminated; air conditioning was annunciated and the right wing body overheat light was on. I immediately aborted in compliance with my predep brief. The abort was uneventful. We taxied clear to a hardstand. I called maintenance and in the discussion we agreed this was a sensor issue as the right pneumatic duct had zero pressure. We proceeded to takeoff again; this time briefing that if the master caution light illuminated below 80 KTS and it was the right wing body overheat; we would continue the takeoff. In fact; the right wind body overheat illuminated briefly near 120 KTS. The flight continued without incident.
Original NASA ASRS Text
Title: B737-500 OPERATING WITH A DEFERRED RIGHT PNEUMATIC SYSTEM REJECTS A TKOF FOR A RIGHT WING BODY OVERHEAT WARNING. REACH AGREEMENT WITH MAINT THAT IT IS A SENSOR ISSUE AND COMPLETE THE FLT.
Narrative: BEFORE DEP; R WING BODY OVERHEAT LIGHT WAS DEFERRED DUE TO A BAD SENSOR. IN COMPLIANCE WITH THE MEL; THE ISOLATION; R PACK; AND R ENG BLEED VALVES WERE CLOSED. NO PROBS WERE ENCOUNTERED ON THE FLT FROM ZZZ1 TO ZZZ. ON THE TKOF ROLL FROM ZZZ TO ZZZ1 JUST BEFORE 80 KTS THE MASTER CAUTION LIGHT ILLUMINATED; AIR CONDITIONING WAS ANNUNCIATED AND THE R WING BODY OVERHEAT LIGHT WAS ON. I IMMEDIATELY ABORTED IN COMPLIANCE WITH MY PREDEP BRIEF. THE ABORT WAS UNEVENTFUL. WE TAXIED CLR TO A HARDSTAND. I CALLED MAINT AND IN THE DISCUSSION WE AGREED THIS WAS A SENSOR ISSUE AS THE R PNEUMATIC DUCT HAD ZERO PRESSURE. WE PROCEEDED TO TKOF AGAIN; THIS TIME BRIEFING THAT IF THE MASTER CAUTION LIGHT ILLUMINATED BELOW 80 KTS AND IT WAS THE R WING BODY OVERHEAT; WE WOULD CONTINUE THE TKOF. IN FACT; THE R WIND BODY OVERHEAT ILLUMINATED BRIEFLY NEAR 120 KTS. THE FLT CONTINUED WITHOUT INCIDENT.
Data retrieved from NASA's ASRS site as of May 2009 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.