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A B737-800 flight crew noted the right engine bleed had failed to close as required for their planned 'no engine bleed' 30 degree flap landing at a very high altitude airport. Because of lack of time and fuel to reconfigure the aircraft for either a reduced flap extension landing or a potentially thrust limited go-around they opted to land with flaps at 30 degrees; which they did uneventfully.
| Attributes | |
| ACN | 962315 |
| Time | |
| Date | 201107 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | ZZZZ.Airport |
| State Reference | FO |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Make Model Name | B737-800 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Final Approach |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Pneumatic System Control |
| Person 1 | |
| Function | Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Person 2 | |
| Function | First Officer |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical Deviation - Procedural FAR Deviation - Procedural Published Material / Policy Deviation - Procedural Weight And Balance Inflight Event / Encounter Fuel Issue |
Narrative:
At approximately 700 ft afl we noticed the right engine bleed failed to close as required per the aom checklist for a flaps 30; bleeds off; landing. The first officer cycled the switch but the bleed stayed full open. We elected; as the safest course of action; to continue and land at 30 flaps as we were well below 1;000 ft afl. Changing flaps and approach speed was too dangerous; as was a possible mountainous terrain go-around at the minimum divert fuel for our alternate. After landing; the bleed valve was; in fact; confirmed full open.note: if there was a subsequent high altitude takeoff and the crew failed (easily) to notice the valve open for a bleeds off required takeoff; a dangerous lack of performance would have resulted. Also; if there is a bleed leak; the only solution would be to shut down the engine.
Original NASA ASRS Text
Title: A B737-800 flight crew noted the right engine bleed had failed to close as required for their planned 'no engine bleed' 30 degree flap landing at a very high altitude airport. Because of lack of time and fuel to reconfigure the aircraft for either a reduced flap extension landing or a potentially thrust limited go-around they opted to land with flaps at 30 degrees; which they did uneventfully.
Narrative: At approximately 700 FT AFL we noticed the right engine bleed failed to close as required per the AOM checklist for a flaps 30; bleeds off; landing. The First Officer cycled the switch but the bleed stayed full open. We elected; as the safest course of action; to continue and land at 30 flaps as we were well below 1;000 FT AFL. Changing flaps and approach speed was too dangerous; as was a possible mountainous terrain go-around at the minimum divert fuel for our alternate. After landing; the bleed valve was; in fact; confirmed full open.Note: if there was a subsequent high altitude takeoff and the crew failed (easily) to notice the valve open for a bleeds off required takeoff; a dangerous lack of performance would have resulted. Also; if there is a bleed leak; the only solution would be to shut down the engine.
Data retrieved from NASA's ASRS site as of April 2012 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.