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A B737-700 captain reports all overhead P-5 panel guarded switches safetied with .020 inch stainless wire. Should be thin copper breakaway wire.
| Attributes | |
| ACN | 708201 |
| Time | |
| Date | 200608 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Environment | |
| Light | Night |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B737-700 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : parked ground : pushback |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Experience | flight time last 90 days : 230 flight time type : 7000 |
| ASRS Report | 708201 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper maintenance non adherence : far non adherence : published procedure |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other |
| Factors | |
| Maintenance | performance deficiency : non compliance with legal requirements performance deficiency : installation performance deficiency : logbook entry performance deficiency : scheduled maintenance |
| Supplementary | |
| Problem Areas | Chart Or Publication Maintenance Human Performance Aircraft |
| Primary Problem | Maintenance Human Performance |
Narrative:
As I sat down in my seat; I noticed that the red alternate flaps; standby power disconnect switches and the pass oxygen switch were all safety wired with non-breakable silver colored (.02?) safety wire. I called maintenance and they came out and replaced all the wire with the normal copper colored wire. Both the mechanic and myself attempted to break a switch free with the silver wire installed and we were unable to find out who installed the wire and see if they did it to any other aircraft.
Original NASA ASRS Text
Title: A B737-700 CAPT RPTS ALL OVERHEAD P-5 PANEL GUARDED SWITCHES SAFETIED WITH .020 INCH STAINLESS WIRE. SHOULD BE THIN COPPER BREAKAWAY WIRE.
Narrative: AS I SAT DOWN IN MY SEAT; I NOTICED THAT THE RED ALTERNATE FLAPS; STANDBY PWR DISCONNECT SWITCHES AND THE PASS OXYGEN SWITCH WERE ALL SAFETY WIRED WITH NON-BREAKABLE SILVER COLORED (.02?) SAFETY WIRE. I CALLED MAINT AND THEY CAME OUT AND REPLACED ALL THE WIRE WITH THE NORMAL COPPER COLORED WIRE. BOTH THE MECH AND MYSELF ATTEMPTED TO BREAK A SWITCH FREE WITH THE SILVER WIRE INSTALLED AND WE WERE UNABLE TO FIND OUT WHO INSTALLED THE WIRE AND SEE IF THEY DID IT TO ANY OTHER ACFT.
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.