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A B737 flight crew failed to follow MEL procedures on takeoff with an engine bleed inoperative and the aircraft would not pressurize. When normal pressurization could not be restored with the procedure; the flight crew diverted to nearest suitable airport.
| Attributes | |
| ACN | 799130 |
| Time | |
| Date | 200808 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | msl single value : 3000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Dusk |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B737 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : initial |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Experience | flight time last 90 days : 180 flight time type : 7000 |
| ASRS Report | 799130 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Experience | flight time last 90 days : 200 flight time type : 4500 |
| ASRS Report | 799131 |
| Events | |
| Anomaly | aircraft equipment problem : critical non adherence : published procedure |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | flight crew : diverted to another airport |
| Supplementary | |
| Problem Areas | Aircraft Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
Narrative:
Aircraft dispatched with MEL'ed #2 prsov; which has an operations procedure to reconfigure pneumatic bleed switches prior to takeoff. Procedure was not properly complied with. After takeoff; cabin did not pressurize properly. Cabin altitude could not subsequently be maintained using QRH procedures; requiring diversion to ZZZ.
Original NASA ASRS Text
Title: A B737 FLT CREW FAILED TO FOLLOW MEL PROCEDURES ON TAKEOFF WITH AN ENG BLEED INOP AND THE AIRCRAFT WOULD NOT PRESSURIZE. WHEN NORMAL PRESSURIZATION COULD NOT BE RESTORED WITH THE PROCEDURE; THE FLT CREW DIVERTED TO NEAREST SUITABLE ARPT.
Narrative: ACFT DISPATCHED WITH MEL'ED #2 PRSOV; WHICH HAS AN OPS PROC TO RECONFIGURE PNEUMATIC BLEED SWITCHES PRIOR TO TKOF. PROC WAS NOT PROPERLY COMPLIED WITH. AFTER TKOF; CABIN DID NOT PRESSURIZE PROPERLY. CABIN ALT COULD NOT SUBSEQUENTLY BE MAINTAINED USING QRH PROCS; REQUIRING DIVERSION TO ZZZ.
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.