 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Air carrier deviates for WX, has pressurization problems, diverts to alternate. Maintenance done, but incorrectly. Captain fails to check prior to departure.
| Attributes | |
| ACN | 216923 |
| Time | |
| Date | 199207 |
| Day | Tue |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : dsm |
| State Reference | IA |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | ground : preflight ground : parked |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : commercial |
| Experience | flight time last 90 days : 210 flight time total : 6800 flight time type : 2270 |
| ASRS Report | 216923 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Events | |
| Anomaly | aircraft equipment problem : critical non adherence : published procedure non adherence : far |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : unable |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
After a pressurization problem and diversion due to WX at our destination we landed at our alternate for fuel, maintenance and for the WX to improve. Contract maintenance was called to fix our pressurization problem. The problem was fixed, we thought, and we departed. On climb out we could not pressurize the aircraft. We switched to manual control and landed uneventfully at our destination. Upon landing we discovered that maintenance had collared the wrong circuit breakers rendering our automatic system inoperative. Of course I was embarrassed upon the discovery. I didn't take the time like I usually do to verify the correct circuit breakers were pulled. In my haste to leave I forgot to check. No harm was done this time. Next time I will check. P.south. The MEL procedure if not read carefully leads one to pull the wrong circuit breakers. Only 1 system was inoperative, but circuit breakers for both pressurization controls were inadvertently pulled.
Original NASA ASRS Text
Title: ACR DEVIATES FOR WX, HAS PRESSURIZATION PROBLEMS, DIVERTS TO ALTERNATE. MAINT DONE, BUT INCORRECTLY. CAPT FAILS TO CHK PRIOR TO DEP.
Narrative: AFTER A PRESSURIZATION PROBLEM AND DIVERSION DUE TO WX AT OUR DEST WE LANDED AT OUR ALTERNATE FOR FUEL, MAINT AND FOR THE WX TO IMPROVE. CONTRACT MAINT WAS CALLED TO FIX OUR PRESSURIZATION PROBLEM. THE PROBLEM WAS FIXED, WE THOUGHT, AND WE DEPARTED. ON CLBOUT WE COULD NOT PRESSURIZE THE ACFT. WE SWITCHED TO MANUAL CTL AND LANDED UNEVENTFULLY AT OUR DEST. UPON LNDG WE DISCOVERED THAT MAINT HAD COLLARED THE WRONG CIRCUIT BREAKERS RENDERING OUR AUTO SYS INOP. OF COURSE I WAS EMBARRASSED UPON THE DISCOVERY. I DIDN'T TAKE THE TIME LIKE I USUALLY DO TO VERIFY THE CORRECT CIRCUIT BREAKERS WERE PULLED. IN MY HASTE TO LEAVE I FORGOT TO CHK. NO HARM WAS DONE THIS TIME. NEXT TIME I WILL CHK. P.S. THE MEL PROC IF NOT READ CAREFULLY LEADS ONE TO PULL THE WRONG CIRCUIT BREAKERS. ONLY 1 SYS WAS INOP, BUT CIRCUIT BREAKERS FOR BOTH PRESSURIZATION CTLS WERE INADVERTENTLY PULLED.
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.