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Mechanic and maintenance control working an md-80 #2 autoland failure realize later they should have also placarded the dual rudder servo and downgraded the landing status to not CAT 2 capable.
| Attributes | |
| ACN | 778204 |
| Time | |
| Date | 200803 |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Aircraft 1 | |
| Make Model Name | MD-80 Series (DC-9-80) Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| ASRS Report | 778204 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | other personnel other |
| Events | |
| Anomaly | aircraft equipment problem : less severe maintenance problem : improper maintenance non adherence : published procedure |
| Independent Detector | other other : 1969 |
| Consequence | other |
| Factors | |
| Maintenance | contributing factor : schedule pressure contributing factor : briefing performance deficiency : non compliance with legal requirements performance deficiency : fault isolation performance deficiency : logbook entry |
| Supplementary | |
| Problem Areas | Aircraft Maintenance Human Performance |
| Primary Problem | Maintenance Human Performance |
Narrative:
Mr X and myself didn't think that the aircraft needed to be downgraded and the dual rudder servo drive placarded at the time. But until further review; we did a little more research of the problem. The item in the logbook was on final approach; the no autoland light for #2 autoplt; didn't come on FMA (flight mode annunciator). So I looked on the stp panel for #1 autoplt and for #2 autoplt. I found that the #2 autoplt side that the parallel rudder servo fail was on the last 5 out of 6 flts and that the #1 autoplt didn't record any problems. So we decided to placard the autoland mode for the #2 autoplt side only. Upon further review; we should have also placarded the dual rudder servo drive and downgraded the lmp (landing mode) status to not CAT 2. We should have done more research of the problem and not to worry about delaying the flight. Then we needed to downgrade the lmp and placard the dual rudder servo drive.
Original NASA ASRS Text
Title: MECHANIC AND MAINT CONTROL WORKING AN MD-80 #2 AUTOLAND FAILURE REALIZE LATER THEY SHOULD HAVE ALSO PLACARDED THE DUAL RUDDER SERVO AND DOWNGRADED THE LANDING STATUS TO NOT CAT 2 CAPABLE.
Narrative: MR X AND MYSELF DIDN'T THINK THAT THE ACFT NEEDED TO BE DOWNGRADED AND THE DUAL RUDDER SERVO DRIVE PLACARDED AT THE TIME. BUT UNTIL FURTHER REVIEW; WE DID A LITTLE MORE RESEARCH OF THE PROB. THE ITEM IN THE LOGBOOK WAS ON FINAL APCH; THE NO AUTOLAND LIGHT FOR #2 AUTOPLT; DIDN'T COME ON FMA (FLT MODE ANNUNCIATOR). SO I LOOKED ON THE STP PANEL FOR #1 AUTOPLT AND FOR #2 AUTOPLT. I FOUND THAT THE #2 AUTOPLT SIDE THAT THE PARALLEL RUDDER SERVO FAIL WAS ON THE LAST 5 OUT OF 6 FLTS AND THAT THE #1 AUTOPLT DIDN'T RECORD ANY PROBS. SO WE DECIDED TO PLACARD THE AUTOLAND MODE FOR THE #2 AUTOPLT SIDE ONLY. UPON FURTHER REVIEW; WE SHOULD HAVE ALSO PLACARDED THE DUAL RUDDER SERVO DRIVE AND DOWNGRADED THE LMP (LNDG MODE) STATUS TO NOT CAT 2. WE SHOULD HAVE DONE MORE RESEARCH OF THE PROB AND NOT TO WORRY ABOUT DELAYING THE FLT. THEN WE NEEDED TO DOWNGRADE THE LMP AND PLACARD THE DUAL RUDDER SERVO DRIVE.
Data retrieved from NASA's ASRS site as of May 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.