 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
A B737-700 was dispatched with the incorrect inlet anti-ice valve blocked closed. MEL required 9TH stage valve locked closed. Locked regulator shutoff valve.
| Attributes | |
| ACN | 646972 |
| Time | |
| Date | 200502 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B737-700 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : parked ground : preflight |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| ASRS Report | 3646972 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper documentation maintenance problem : improper maintenance maintenance problem : non compliance with mel non adherence : published procedure non adherence : far |
| Independent Detector | aircraft equipment other aircraft equipment : eicas 'bleed inop' warning other flight crewa other flight crewb |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other other |
| Factors | |
| Maintenance | contributing factor : schedule pressure contributing factor : manuals performance deficiency : logbook entry performance deficiency : non compliance with legal requirements |
| Supplementary | |
| Problem Areas | Aircraft Maintenance Human Performance Chart Or Publication |
| Primary Problem | Maintenance Human Performance |
Narrative:
Using MEL 30-3F as guide blocked wrong valve closed. Should have been 9TH stage bleed valve but locked closed prsov. Both valves are one on top of each other and the picture in the book shows high pressure valve as the inboard side of core cowl.
Original NASA ASRS Text
Title: A B737-700 WAS DISPATCHED WITH THE INCORRECT INLET ANTI-ICE VALVE BLOCKED CLOSED. MEL REQUIRED 9TH STAGE VALVE LOCKED CLOSED. LOCKED REGULATOR SHUTOFF VALVE.
Narrative: USING MEL 30-3F AS GUIDE BLOCKED WRONG VALVE CLOSED. SHOULD HAVE BEEN 9TH STAGE BLEED VALVE BUT LOCKED CLOSED PRSOV. BOTH VALVES ARE ONE ON TOP OF EACH OTHER AND THE PICTURE IN THE BOOK SHOWS HIGH PRESSURE VALVE AS THE INBOARD SIDE OF CORE COWL.
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.