An MD80 was dispatched on a maintenance ferry in non-compliance with the aft pressure bulkhead crack...

Attributes
ACN	488247
Time
Date	200010
Day	Thu
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Environment
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	MD-80 Series (DC-9-80) Undifferentiated or Other Model
Operating Under FAR Part	Part 91
Flight Phase	ground : parked ground : maintenance
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	maintenance : technician
Qualification	technician : airframe technician : powerplant
Experience	maintenance technician : 20
ASRS Report	488247
Person 2
Affiliation	company : air carrier
Function	maintenance : technician
Qualification	technician : airframe technician : powerplant
Experience	maintenance technician : 14
ASRS Report	487920
Events
Anomaly	aircraft equipment problem : critical ground encounters other maintenance problem : improper maintenance maintenance problem : non compliance with mel maintenance problem : improper documentation non adherence : published procedure non adherence : far
Independent Detector	other other : 969
Consequence	other other
Factors
Maintenance	contributing factor : schedule pressure performance deficiency : fault isolation performance deficiency : logbook entry performance deficiency : inspection performance deficiency : repair
Supplementary
Problem Areas	Maintenance Human Performance Aircraft
Primary Problem	Maintenance Human Performance

Narrative:

I was sent to ZZZ from XXX to evaluate/replace aircraft xyz's APU after the APU had an uncontained failure. I started disconnecting APU connections when a puncture of the APU compartment was found. We were unable to remove the APU due to the lifting brace boss broken on the APU gearbox. We started to reconnect the APU connections to release the APU on MEL. The inspector and lead mechanic went to inspect the aft pressure bulkhead for damage. I continued to reconnect the APU connections when we were told that the aft pressure bulkhead had no damage. The APU was placed on MEL and the aircraft was flown to XXX, that maintenance worked. In XXX when the APU and the APU compartment housing was removed a crack was found in the aft pressure bulkhead from debris of the APU failure.

Original NASA ASRS Text

Title: AN MD80 WAS DISPATCHED ON A MAINT FERRY IN NON-COMPLIANCE WITH THE AFT PRESSURE BULKHEAD CRACKED.

Narrative: I WAS SENT TO ZZZ FROM XXX TO EVALUATE/REPLACE ACFT XYZ'S APU AFTER THE APU HAD AN UNCONTAINED FAILURE. I STARTED DISCONNECTING APU CONNECTIONS WHEN A PUNCTURE OF THE APU COMPARTMENT WAS FOUND. WE WERE UNABLE TO REMOVE THE APU DUE TO THE LIFTING BRACE BOSS BROKEN ON THE APU GEARBOX. WE STARTED TO RECONNECT THE APU CONNECTIONS TO RELEASE THE APU ON MEL. THE INSPECTOR AND LEAD MECH WENT TO INSPECT THE AFT PRESSURE BULKHEAD FOR DAMAGE. I CONTINUED TO RECONNECT THE APU CONNECTIONS WHEN WE WERE TOLD THAT THE AFT PRESSURE BULKHEAD HAD NO DAMAGE. THE APU WAS PLACED ON MEL AND THE ACFT WAS FLOWN TO XXX, THAT MAINT WORKED. IN XXX WHEN THE APU AND THE APU COMPARTMENT HOUSING WAS REMOVED A CRACK WAS FOUND IN THE AFT PRESSURE BULKHEAD FROM DEBRIS OF THE APU FAILURE.

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.

An MD80 was dispatched on a maintenance ferry in non-compliance with the aft pressure bulkhead cracked.