 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Widebody transport aircraft in climb at 20,000' lost both air conditioning packs. Flight crew discovered they had been on APU during climb.
| Attributes | |
| ACN | 108443 |
| Time | |
| Date | 198904 |
| Day | Mon |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : ack |
| State Reference | MA |
| Altitude | msl bound lower : 20000 msl bound upper : 20000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zbw |
| Operator | common carrier : air carrier |
| Make Model Name | Widebody, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | departure other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 210 flight time total : 20000 |
| ASRS Report | 108443 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 37 flight time total : 8000 |
| ASRS Report | 108446 |
| Events | |
| Anomaly | aircraft equipment problem : less severe non adherence : published procedure other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course flight crew : regained aircraft control flight crew : overcame equipment problem |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
During takeoff the APU was supplying air to the packs. We had missed it on takeoff (checklist). At 20,000' both packs failed. While trying to reinstate packs it was noticed that the APU supplying air to the packs was the problem. Captain was out of seat checking circuit breakers descent had already begun so aircraft was leveled off when problem was solved. During this time aircraft entered pre-stall buffet. Aircraft was recovered. Situation returned to normal. Balance of flight normal.
Original NASA ASRS Text
Title: WDB ACFT IN CLIMB AT 20,000' LOST BOTH AIR CONDITIONING PACKS. FLT CREW DISCOVERED THEY HAD BEEN ON APU DURING CLIMB.
Narrative: DURING TKOF THE APU WAS SUPPLYING AIR TO THE PACKS. WE HAD MISSED IT ON TKOF (CHECKLIST). AT 20,000' BOTH PACKS FAILED. WHILE TRYING TO REINSTATE PACKS IT WAS NOTICED THAT THE APU SUPPLYING AIR TO THE PACKS WAS THE PROBLEM. CAPT WAS OUT OF SEAT CHECKING CIRCUIT BREAKERS DESCENT HAD ALREADY BEGUN SO ACFT WAS LEVELED OFF WHEN PROBLEM WAS SOLVED. DURING THIS TIME ACFT ENTERED PRE-STALL BUFFET. ACFT WAS RECOVERED. SITUATION RETURNED TO NORMAL. BALANCE OF FLT NORMAL.
Data retrieved from NASA's ASRS site as of August 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.