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Aircraft mechanic was assigned to replace the captain's side altimeter. He realized later, after he left for home, that he forgot to tighten the screws on the altimeter.
| Attributes | |
| ACN | 405647 |
| Time | |
| Date | 199806 |
| Day | Sat |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : zzz |
| State Reference | US |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | DC-9 30 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | other personnel other |
| Qualification | other other : other |
| ASRS Report | 405647 |
| Events | |
| Anomaly | aircraft equipment problem : critical other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : detected after the fact |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
Replaced captain's altimeter due to an in-flight altitude split between captain and first officer altimeters. Performed pitot/static leak test per pitot static manual, and released aircraft for service. After I left the airport for home, I realized the mount screws for the altimeter may have been left loose (captain's side). This was due to my being removed from my assigned area, and reassigned to an aircraft on maintenance delay, to assist other mechanics at the end of a 16-hour shift. The flight crew was present in the cockpit and forward galley area, adding to a high pressure situation.
Original NASA ASRS Text
Title: ACFT MECH WAS ASSIGNED TO REPLACE THE CAPT'S SIDE ALTIMETER. HE REALIZED LATER, AFTER HE LEFT FOR HOME, THAT HE FORGOT TO TIGHTEN THE SCREWS ON THE ALTIMETER.
Narrative: REPLACED CAPT'S ALTIMETER DUE TO AN INFLT ALT SPLIT BTWN CAPT AND FO ALTIMETERS. PERFORMED PITOT/STATIC LEAK TEST PER PITOT STATIC MANUAL, AND RELEASED ACFT FOR SVC. AFTER I LEFT THE ARPT FOR HOME, I REALIZED THE MOUNT SCREWS FOR THE ALTIMETER MAY HAVE BEEN LEFT LOOSE (CAPT'S SIDE). THIS WAS DUE TO MY BEING REMOVED FROM MY ASSIGNED AREA, AND REASSIGNED TO AN ACFT ON MAINT DELAY, TO ASSIST OTHER MECHS AT THE END OF A 16-HR SHIFT. THE FLC WAS PRESENT IN THE COCKPIT AND FORWARD GALLEY AREA, ADDING TO A HIGH PRESSURE SIT.
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.