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A B767-300ER mechanic reports he may have left a tool in the horizontal stabilizer compartment. Environmental heat and lack of air in compartment may have comprised his alertness.
| Attributes | |
| ACN | 750447 |
| Time | |
| Date | 200708 |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B767-300 and 300 ER |
| Operating Under FAR Part | Part 121 |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| ASRS Report | 750447 |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper maintenance non adherence : far non adherence : published procedure |
| Independent Detector | other other : 1 |
| Resolutory Action | flight crew : diverted to another airport |
| Consequence | other |
| Factors | |
| Maintenance | contributing factor : weather performance deficiency : repair performance deficiency : scheduled maintenance performance deficiency : non compliance with legal requirements |
| Supplementary | |
| Problem Areas | Environmental Factor Maintenance Human Performance |
| Primary Problem | Maintenance Human Performance |
| Situations | |
| Publication | Maint Manual Procedures Not Followed |
Narrative:
Due to environmental heat and lack of air my alertness was compromised and a tool may have been remained in the stabilizer compartment. Callback conversation with reporter revealed the following information: reporter stated this tool was his personal wrench he was using to replace the horizontal stabilizer switch control for the stabilizer brake system. The stabilizer compartment was very hot and air circulation was basically non existent. He thought he had removed all his tools; but later noticed the missing wrench when he did a tool check. The aircraft had already departed. He notified the company and the aircraft was diverted and landed without incident. The horizontal compartment was inspected and his wrench was found on the upper surface of the horizontal center box section.
Original NASA ASRS Text
Title: A B767-300ER MECHANIC REPORTS HE MAY HAVE LEFT A TOOL IN THE HORIZ STAB COMPARTMENT. ENVIRONMENTAL HEAT AND LACK OF AIR IN COMPARTMENT MAY HAVE COMPRISED HIS ALERTNESS.
Narrative: DUE TO ENVIRONMENTAL HEAT AND LACK OF AIR MY ALERTNESS WAS COMPROMISED AND A TOOL MAY HAVE BEEN REMAINED IN THE STABILIZER COMPARTMENT. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR STATED THIS TOOL WAS HIS PERSONAL WRENCH HE WAS USING TO REPLACE THE HORIZ STAB SWITCH CONTROL FOR THE STAB BRAKE SYSTEM. THE STABILIZER COMPARTMENT WAS VERY HOT AND AIR CIRCULATION WAS BASICALLY NON EXISTENT. HE THOUGHT HE HAD REMOVED ALL HIS TOOLS; BUT LATER NOTICED THE MISSING WRENCH WHEN HE DID A TOOL CHECK. THE ACFT HAD ALREADY DEPARTED. HE NOTIFIED THE COMPANY AND THE ACFT WAS DIVERTED AND LANDED WITHOUT INCIDENT. THE HORIZ COMPARTMENT WAS INSPECTED AND HIS WRENCH WAS FOUND ON THE UPPER SURFACE OF THE HORIZ CENTER BOX SECTION.
Data retrieved from NASA's ASRS site as of January 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.