 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
A B727 rejected takeoff due to an anti-ice duct overheat warning caused by a disconnected anti-ice duct in the vertical stabilizer not connected after maintenance.
| Attributes | |
| ACN | 458461 |
| Time | |
| Date | 199912 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B727 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance ground : parked |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : inspector |
| Qualification | technician : airframe technician : inspection authority technician : powerplant |
| Experience | maintenance technician : 5 |
| ASRS Report | 458461 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : airframe technician : powerplant |
| Experience | maintenance technician : 2 |
| ASRS Report | 458477 |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper maintenance non adherence : published procedure non adherence : far |
| Independent Detector | aircraft equipment other aircraft equipment : duct overheat warning |
| Resolutory Action | flight crew : rejected takeoff |
| Consequence | other other |
| Factors | |
| Maintenance | contributing factor : schedule pressure contributing factor : work cards performance deficiency : scheduled maintenance performance deficiency : non compliance with legal requirements performance deficiency : inspection |
| Supplementary | |
| Problem Areas | Maintenance Human Performance Aircraft Chart Or Publication |
| Primary Problem | Maintenance Human Performance |
Narrative:
In beginning a repair to the right side of the vertical stabilizer, it was necessary to disconnect an anti-ice duct to gain access to the repair area. No documentation was made on the disconnected duct. The repair last 5 days through 3 shifts each day. Final inspection of the repair, or of the area, before close-up never caught the loose duct. Neither did the other mechanics involved in the repair question the loose duct. The aircraft was closed up and test flown with no knowledge of the loose duct. It was then returned to service and on the first revenue flight had to abort takeoff. Inspection revealed that wires near the duct had melted causing irregular indications and alarms.
Original NASA ASRS Text
Title: A B727 REJECTED TKOF DUE TO AN ANTI-ICE DUCT OVERHEAT WARNING CAUSED BY A DISCONNECTED ANTI-ICE DUCT IN THE VERT STABILIZER NOT CONNECTED AFTER MAINT.
Narrative: IN BEGINNING A REPAIR TO THE R SIDE OF THE VERT STABILIZER, IT WAS NECESSARY TO DISCONNECT AN ANTI-ICE DUCT TO GAIN ACCESS TO THE REPAIR AREA. NO DOCUMENTATION WAS MADE ON THE DISCONNECTED DUCT. THE REPAIR LAST 5 DAYS THROUGH 3 SHIFTS EACH DAY. FINAL INSPECTION OF THE REPAIR, OR OF THE AREA, BEFORE CLOSE-UP NEVER CAUGHT THE LOOSE DUCT. NEITHER DID THE OTHER MECHS INVOLVED IN THE REPAIR QUESTION THE LOOSE DUCT. THE ACFT WAS CLOSED UP AND TEST FLOWN WITH NO KNOWLEDGE OF THE LOOSE DUCT. IT WAS THEN RETURNED TO SVC AND ON THE FIRST REVENUE FLT HAD TO ABORT TKOF. INSPECTION REVEALED THAT WIRES NEAR THE DUCT HAD MELTED CAUSING IRREGULAR INDICATIONS AND ALARMS.
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.