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A B737-700 after #2 engine pneumatic work was performed the engine was run at high power. Unlatched engine cowling opened incurring damage to insulation blankets.
| Attributes | |
| ACN | 561231 |
| Time | |
| Date | 200209 |
| Day | Sat |
| Local Time Of Day | 0001 To 0600 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Environment | |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tower : crw.tower |
| Operator | common carrier : air carrier |
| Make Model Name | B737-700 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : powerplant technician : airframe |
| ASRS Report | 561231 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : airframe technician : powerplant |
| ASRS Report | 561232 |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper maintenance non adherence : published procedure non adherence : far |
| Independent Detector | other other : person 1 |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other other other other |
| Factors | |
| Maintenance | contributing factor : schedule pressure performance deficiency : testing |
| Supplementary | |
| Problem Areas | Maintenance Human Performance Aircraft Company |
| Primary Problem | Maintenance Human Performance |
| Situations | |
| Publication | ENG RUN MANUAL |
Narrative:
Aircraft arrived in ZZZ for scheduled A2 check and other maintenance. #2 engine had an alert for low duct pressure. #2 engine core cowls were opened to troubleshoot and perform maintenance. High stage regulator was changed and cowls closed, but not latched, engine was run to perform A2 leak check requirements. During the engine run, the cowls partially opened. I instructed to shut down #2 engine. After shutdown an engine inspection was performed and damage to core cowl insulation blankets were found. Insulator blankets were removed and replaced on sep/sun/02.
Original NASA ASRS Text
Title: A B737-700 AFTER #2 ENG PNEUMATIC WORK WAS PERFORMED THE ENG WAS RUN AT HIGH PWR. UNLATCHED ENG COWLING OPENED INCURRING DAMAGE TO INSULATION BLANKETS.
Narrative: ACFT ARRIVED IN ZZZ FOR SCHEDULED A2 CHK AND OTHER MAINT. #2 ENG HAD AN ALERT FOR LOW DUCT PRESSURE. #2 ENG CORE COWLS WERE OPENED TO TROUBLESHOOT AND PERFORM MAINT. HIGH STAGE REGULATOR WAS CHANGED AND COWLS CLOSED, BUT NOT LATCHED, ENG WAS RUN TO PERFORM A2 LEAK CHK REQUIREMENTS. DURING THE ENG RUN, THE COWLS PARTIALLY OPENED. I INSTRUCTED TO SHUT DOWN #2 ENG. AFTER SHUTDOWN AN ENG INSPECTION WAS PERFORMED AND DAMAGE TO CORE COWL INSULATION BLANKETS WERE FOUND. INSULATOR BLANKETS WERE REMOVED AND REPLACED ON SEP/SUN/02.
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.