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An MD80 pressure flow annunciator would not test. Replaced lamps and panel. Still would not test. Maintenance control had technician sign off as normal.
| Attributes | |
| ACN | 681655 |
| Time | |
| Date | 200512 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | MD-80 Series (DC-9-80) Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : parked |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| ASRS Report | 681655 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| ASRS Report | 682157 |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper maintenance maintenance problem : improper documentation non adherence : published procedure non adherence : far |
| Independent Detector | aircraft equipment other aircraft equipment : press flow warning other flight crewa other flight crewb |
| Resolutory Action | none taken : anomaly accepted |
| Consequence | other other |
| Factors | |
| Maintenance | contributing factor : manuals contributing factor : schedule pressure performance deficiency : repair performance deficiency : non compliance with legal requirements performance deficiency : fault isolation performance deficiency : logbook entry |
| Supplementary | |
| Problem Areas | Maintenance Human Performance Flight Crew Human Performance Aircraft Chart Or Publication |
| Primary Problem | Chart Or Publication |
| Situations | |
| Publication | Flt Operations Manual |
Narrative:
The 'pressurization flow' annunciator light would not illuminate when tested. After relamping and even changing out the whole annunciator panel; air carrier maintenance tested the lights on several other MD80's and found that none of them tested. Then both the air carrier supervisor and company technician decided that the system was working properly and should be signed off. Both the mechanic and I deferred to their expert opinions and we departed with no further action taken. The mechanic wasn't satisfied with their explanation; so he dug into the wiring diagrams and discovered that they had been wrong. He met us at the gate upon our arrival and told us what he had found; and that cycling the circuit breaker would reset the system. He should be commended for his conscientious extra effort to do the job correctly.
Original NASA ASRS Text
Title: AN MD80 PRESSURE FLOW ANNUNCIATOR WOULD NOT TEST. REPLACED LAMPS AND PANEL. STILL WOULD NOT TEST. MAINT CTL HAD TECHNICIAN SIGN OFF AS NORMAL.
Narrative: THE 'PRESSURIZATION FLOW' ANNUNCIATOR LIGHT WOULD NOT ILLUMINATE WHEN TESTED. AFTER RELAMPING AND EVEN CHANGING OUT THE WHOLE ANNUNCIATOR PANEL; ACR MAINT TESTED THE LIGHTS ON SEVERAL OTHER MD80'S AND FOUND THAT NONE OF THEM TESTED. THEN BOTH THE ACR SUPVR AND COMPANY TECHNICIAN DECIDED THAT THE SYS WAS WORKING PROPERLY AND SHOULD BE SIGNED OFF. BOTH THE MECH AND I DEFERRED TO THEIR EXPERT OPINIONS AND WE DEPARTED WITH NO FURTHER ACTION TAKEN. THE MECH WASN'T SATISFIED WITH THEIR EXPLANATION; SO HE DUG INTO THE WIRING DIAGRAMS AND DISCOVERED THAT THEY HAD BEEN WRONG. HE MET US AT THE GATE UPON OUR ARR AND TOLD US WHAT HE HAD FOUND; AND THAT CYCLING THE CIRCUIT BREAKER WOULD RESET THE SYS. HE SHOULD BE COMMENDED FOR HIS CONSCIENTIOUS EXTRA EFFORT TO DO THE JOB CORRECTLY.
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.