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After push-back APU automatic failed. Flight towed back to gate for air start. Flight crew interpreted minimum equipment list as legal to depart.
| Attributes | |
| ACN | 122468 |
| Time | |
| Date | 198909 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : dfw |
| State Reference | TX |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Widebody, Low Wing, 3 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | ground : preflight ground other : taxi |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 94 flight time total : 15000 flight time type : 1600 |
| ASRS Report | 122468 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : cfi pilot : atp pilot : commercial |
| Experience | flight time last 90 days : 220 flight time total : 7500 flight time type : 800 |
| ASRS Report | 122803 |
| Events | |
| Anomaly | aircraft equipment problem : less severe non adherence : far |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : overcame equipment problem |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
Normal pushback from gate into alley. APU failed with automatic shutdown. No adverse indications. Unable to restart APU, and therefore was unable to start engines. Requested tow back into gate area for air start and electrical power. Interpretation of MEL, because aircraft was off gate, indicated crew placard of APU was authority/authorized. A normal engine start was accomplished. Aircraft continued (with clearance) pushback, and taxi to takeoff position. Flight continued as normal operation. Continued investigation of occurrence indicated maintenance was required for log book entry at station when aircraft re-entered gate for start.
Original NASA ASRS Text
Title: AFTER PUSH-BACK APU AUTO FAILED. FLT TOWED BACK TO GATE FOR AIR START. FLT CREW INTERPRETED MINIMUM EQUIPMENT LIST AS LEGAL TO DEPART.
Narrative: NORMAL PUSHBACK FROM GATE INTO ALLEY. APU FAILED WITH AUTO SHUTDOWN. NO ADVERSE INDICATIONS. UNABLE TO RESTART APU, AND THEREFORE WAS UNABLE TO START ENGS. REQUESTED TOW BACK INTO GATE AREA FOR AIR START AND ELECTRICAL PWR. INTERP OF MEL, BECAUSE ACFT WAS OFF GATE, INDICATED CREW PLACARD OF APU WAS AUTH. A NORMAL ENG START WAS ACCOMPLISHED. ACFT CONTINUED (WITH CLRNC) PUSHBACK, AND TAXI TO TKOF POS. FLT CONTINUED AS NORMAL OPERATION. CONTINUED INVESTIGATION OF OCCURRENCE INDICATED MAINT WAS REQUIRED FOR LOG BOOK ENTRY AT STATION WHEN ACFT RE-ENTERED GATE FOR START.
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.