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A mechanic reports being assigned a job task to replace the 'dummy bracket' for a #2 engine bsv (booster stage valve) relating to an MEL class-2 message associated with the fadec on an A320 aircraft. Mechanic performed a dry motor run believing no fuel lines had been disconnected at the bleed valve actuator. Engine later auto-shutdown inflight due to fuel leak.
| Attributes | |
| ACN | 906547 |
| Time | |
| Date | 201008 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Light | Night |
| Aircraft 1 | |
| Make Model Name | A320 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Parked |
| Component | |
| Aircraft Component | Engine Control |
| Person 1 | |
| Function | Technician |
| Qualification | Maintenance Airframe Maintenance Powerplant |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical Deviation - Procedural Maintenance Inflight Event / Encounter Fuel Issue |
Narrative:
I and co-worker mechanic 'X' were assigned a job task for an A320 aircraft to replace the 'dummy bracket' for #2 engine's bsv (booster stage valve). The job task was an MEL relating to a class-2 message that was associated with the fadec. I printed out amm reference 73-11-70; primarily for location and torque values of the 'dummy bracket' being installed. Because this 'dummy bracket' was installed and not the bsv; we performed a dry motor run with # 2 fadec 'on'; to ensure no faults were generated. No faults were recorded; so the presumption was that everything else in amm reference 73-11-70 was ideally for the bsv installation. And because no fuel lines were disconnected; the idea of an idle leake check didn't seem necessary.aircraft engine auto-shutdown. A fuel leak was identified. No specific information on how to remove and install 'dummy bracket'. I suggest a job card providing information on removing and installing 'dummy bracket'.
Original NASA ASRS Text
Title: A Mechanic reports being assigned a job task to replace the 'dummy bracket' for a #2 engine BSV (Booster Stage Valve) relating to an MEL Class-2 message associated with the FADEC on an A320 aircraft. Mechanic performed a dry motor run believing no fuel lines had been disconnected at the Bleed Valve Actuator. Engine later auto-shutdown inflight due to fuel leak.
Narrative: I and co-worker Mechanic 'X' were assigned a job task for an A320 aircraft to replace the 'dummy bracket' for #2 engine's BSV (Booster Stage Valve). The job task was an MEL relating to a Class-2 message that was associated with the FADEC. I printed out AMM reference 73-11-70; primarily for location and torque values of the 'dummy bracket' being installed. Because this 'dummy bracket' was installed and not the BSV; we performed a dry motor run with # 2 FADEC 'On'; to ensure no faults were generated. No faults were recorded; so the presumption was that everything else in AMM reference 73-11-70 was ideally for the BSV installation. And because no fuel lines were disconnected; the idea of an idle leake check didn't seem necessary.Aircraft engine auto-shutdown. A fuel leak was identified. No specific information on how to remove and install 'dummy bracket'. I suggest a job card providing information on removing and installing 'dummy bracket'.
Data retrieved from NASA's ASRS site as of April 2012 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.