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While replacing the right hand aft position primary light assembly on a B717; a mechanic is distracted with other multiple maintenance tasks. He later realizes he forgot to install the screws that secure the light to the already departed aircraft.
| Attributes | |
| ACN | 809865 |
| Time | |
| Date | 200810 |
| Local Time Of Day | 0001 To 0600 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B717 |
| Operating Under FAR Part | Part 121 |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| ASRS Report | 809865 |
| Events | |
| Anomaly | aircraft equipment problem : less severe maintenance problem : improper maintenance non adherence : published procedure non adherence : far |
| Independent Detector | other other : 1 |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other |
| Factors | |
| Maintenance | contributing factor : schedule pressure performance deficiency : non compliance with legal requirements performance deficiency : installation |
| Supplementary | |
| Problem Areas | Aircraft Environmental Factor Maintenance Human Performance |
| Primary Problem | Maintenance Human Performance |
Narrative:
The r-hand aft position light primary light is inoperative. I re-lamped the light assembly and still inoperative. I removed and replaced the aft position light assembly and I had a hard time in aligning the holes for the screws. I was able to install it by putting a lot of force. I performed operations test before installing the screws; but I was interrupted to another job; installed a missing static wick on left wing. I worked in the avionics shop B717 handset and battery pack. Then on aircraft X worked on write-up for auxiliary hydraulic pump test. I was changing my clothes ready to go home; I found screws on my shirt pocket. I immediately talk to mr X and mr Y telling them that I forget to install the screws on the aft position light. I went home and around XA30 aircraft return back to ZZZ and was corrected. Supervisor notified. Cause: allowed to be interrupted during the installation. Ensure job is complete before starting another job.
Original NASA ASRS Text
Title: WHILE REPLACING THE RIGHT HAND AFT POSITION PRIMARY LIGHT ASSEMBLY ON A B717; A MECHANIC IS DISTRACTED WITH OTHER MULTIPLE MAINTENANCE TASKS. HE LATER REALIZES HE FORGOT TO INSTALL THE SCREWS THAT SECURE THE LIGHT TO THE ALREADY DEPARTED AIRCRAFT.
Narrative: THE R-HAND AFT POSITION LIGHT PRIMARY LIGHT IS INOP. I RE-LAMPED THE LIGHT ASSEMBLY AND STILL INOP. I REMOVED AND REPLACED THE AFT POSITION LIGHT ASSEMBLY AND I HAD A HARD TIME IN ALIGNING THE HOLES FOR THE SCREWS. I WAS ABLE TO INSTALL IT BY PUTTING A LOT OF FORCE. I PERFORMED OPS TEST BEFORE INSTALLING THE SCREWS; BUT I WAS INTERRUPTED TO ANOTHER JOB; INSTALLED A MISSING STATIC WICK ON L WING. I WORKED IN THE AVIONICS SHOP B717 HANDSET AND BATTERY PACK. THEN ON ACFT X WORKED ON WRITE-UP FOR AUX HYD PUMP TEST. I WAS CHANGING MY CLOTHES READY TO GO HOME; I FOUND SCREWS ON MY SHIRT POCKET. I IMMEDIATELY TALK TO MR X AND MR Y TELLING THEM THAT I FORGET TO INSTALL THE SCREWS ON THE AFT POS LIGHT. I WENT HOME AND AROUND XA30 ACFT RETURN BACK TO ZZZ AND WAS CORRECTED. SUPVR NOTIFIED. CAUSE: ALLOWED TO BE INTERRUPTED DURING THE INSTALLATION. ENSURE JOB IS COMPLETE BEFORE STARTING ANOTHER JOB.
Data retrieved from NASA's ASRS site as of May 2009 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.