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Return land situation mandated for air carrier medium large transport when unable to pressurize aircraft. Aircraft equipment problem malfunction.
| Attributes | |
| ACN | 228038 |
| Time | |
| Date | 199212 |
| Day | Wed |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : den |
| State Reference | CO |
| Altitude | msl bound lower : 8000 msl bound upper : 8000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : den |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | climbout : takeoff climbout : initial landing other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | other personnel other |
| Qualification | other other : other |
| ASRS Report | 228038 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | aircraft equipment problem : critical |
| Independent Detector | other flight crewa |
| Resolutory Action | other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
Airlines aircraft on flight departed denver. Pilot could not pressurize the aircraft. Maintenance found #1 engine bleed valve locked in the closed position. The engine was changed prior to this departure. Engine change paperwork does not address operational checks of engine driven systems. A job card change request has been submitted by denver line maintenance management to rectify this problem.
Original NASA ASRS Text
Title: RETURN LAND SITUATION MANDATED FOR ACR MLG WHEN UNABLE TO PRESSURIZE ACFT. ACFT EQUIP PROBLEM MALFUNCTION.
Narrative: AIRLINES ACFT ON FLT DEPARTED DENVER. PLT COULD NOT PRESSURIZE THE ACFT. MAINT FOUND #1 ENG BLEED VALVE LOCKED IN THE CLOSED POS. THE ENG WAS CHANGED PRIOR TO THIS DEP. ENG CHANGE PAPERWORK DOES NOT ADDRESS OPERATIONAL CHKS OF ENG DRIVEN SYSTEMS. A JOB CARD CHANGE REQUEST HAS BEEN SUBMITTED BY DENVER LINE MAINT MGMNT TO RECTIFY THIS PROBLEM.
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.