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Mechanic placards wrong navigation set inoperative resulting in violation of minimum equipment list requirement.
| Attributes | |
| ACN | 103879 |
| Time | |
| Date | 198902 |
| Day | Mon |
| Local Time Of Day | 0001 To 0600 |
| Place | |
| Locale Reference | airport : sju |
| State Reference | PR |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Widebody, Low Wing, 3 Turbojet Eng |
| Navigation In Use | Other Other |
| Flight Phase | ground : preflight |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : cfi pilot : atp |
| Experience | flight time last 90 days : 125 flight time total : 10500 flight time type : 125 |
| ASRS Report | 103879 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | aircraft equipment problem : less severe non adherence : far other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : detected after the fact none taken : anomaly accepted |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Upon entering the cockpit I went through the normal checklists for the start of a flight. Maintenance had the aircraft log book so I was unable to review the log at this time. Everything was normal except for 1 placard on one of the IRS's. About 15 mins prior to departure maintenance returned the log book. I was busy loading the flight plan into the FMC, so the captain reviewed the log. He concurred that one of the IRS's was inoperative and checked the MEL and determined that we were legal to go since it was the #2 IRS that was placarded. The flight left on time. Upon reaching cruise altitude of 35000', I was flying this leg, the captain did a position check. While doing this check he discovered that the IRS that was placarded and therefore off was not the #2 IRS as was written up in the log book, but was the #3 IRS which we had already entered oceanic control airspace. Fortunately the #2 IRS was working properly. The flight continued west/O any trouble. The IRS's in the widebody transport are numbered left to right 1,3,2. Maintenance mistakenly put the placard on the #3 IRS. They have no #'south on them and were probably thought to be numbered. Should have been more careful in checking which IRS was inoperative. Also, they should have numbers on the IRS so this type error does not happen again.
Original NASA ASRS Text
Title: MECHANIC PLACARDS WRONG NAVIGATION SET INOPERATIVE RESULTING IN VIOLATION OF MINIMUM EQUIPMENT LIST REQUIREMENT.
Narrative: UPON ENTERING THE COCKPIT I WENT THROUGH THE NORMAL CHKLISTS FOR THE START OF A FLT. MAINT HAD THE ACFT LOG BOOK SO I WAS UNABLE TO REVIEW THE LOG AT THIS TIME. EVERYTHING WAS NORMAL EXCEPT FOR 1 PLACARD ON ONE OF THE IRS'S. ABOUT 15 MINS PRIOR TO DEP MAINT RETURNED THE LOG BOOK. I WAS BUSY LOADING THE FLT PLAN INTO THE FMC, SO THE CAPT REVIEWED THE LOG. HE CONCURRED THAT ONE OF THE IRS'S WAS INOP AND CHKED THE MEL AND DETERMINED THAT WE WERE LEGAL TO GO SINCE IT WAS THE #2 IRS THAT WAS PLACARDED. THE FLT LEFT ON TIME. UPON REACHING CRUISE ALT OF 35000', I WAS FLYING THIS LEG, THE CAPT DID A POS CHK. WHILE DOING THIS CHK HE DISCOVERED THAT THE IRS THAT WAS PLACARDED AND THEREFORE OFF WAS NOT THE #2 IRS AS WAS WRITTEN UP IN THE LOG BOOK, BUT WAS THE #3 IRS WHICH WE HAD ALREADY ENTERED OCEANIC CONTROL AIRSPACE. FORTUNATELY THE #2 IRS WAS WORKING PROPERLY. THE FLT CONTINUED W/O ANY TROUBLE. THE IRS'S IN THE WDB ARE NUMBERED LEFT TO RIGHT 1,3,2. MAINT MISTAKENLY PUT THE PLACARD ON THE #3 IRS. THEY HAVE NO #'S ON THEM AND WERE PROBABLY THOUGHT TO BE NUMBERED. SHOULD HAVE BEEN MORE CAREFUL IN CHKING WHICH IRS WAS INOP. ALSO, THEY SHOULD HAVE NUMBERS ON THE IRS SO THIS TYPE ERROR DOES NOT HAPPEN AGAIN.
Data retrieved from NASA's ASRS site as of August 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.