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A commercial fixed wing mdt was dispatched for 10 flts with the oil pressure indicators reading the incorrect engine due to the connectors to the instruments being swapped.
| Attributes | |
| ACN | 377935 |
| Time | |
| Date | 199707 |
| Day | Fri |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : zzz |
| State Reference | US |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 135 |
| Navigation In Use | Other Other |
| Flight Phase | other |
| Flight Plan | None |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : cfi |
| Experience | flight time last 90 days : 150 flight time total : 14000 flight time type : 8500 |
| ASRS Report | 377935 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Events | |
| Anomaly | aircraft equipment problem : critical non adherence : far non adherence : published procedure other anomaly other |
| Independent Detector | other other : unspecified |
| Resolutory Action | none taken : detected after the fact |
| Consequence | Other |
| Supplementary | |
| Air Traffic Incident | other |
Narrative:
Picked up an aircraft in the morning at home base. This base is major maintenance base. Aircraft just came out of major inspection. Preflight was normal, start normal. Flew aircraft for 3 flts and swapped it to another crew who flew it for 7 flts, terminating at an on-line station. The next morning, the originating crew discovered that the oil pressure indications were reversed. Inspection revealed that the cannon plugs to the gauges were hooked up backwards. Although some maintenance was performed overnight at the on-line station, the oil pressure system was not worked on. Apparently me and another captain flew that aircraft for a total of 10 flts without noticing that the oil pressure on start came up on the wrong gauge. The oil pressure warning lights on the annunciator panel worked properly, so the normal after start 'flow' would be correct, and with both engines running, all pressure indications would appear normal.
Original NASA ASRS Text
Title: A COMMERCIAL FIXED WING MDT WAS DISPATCHED FOR 10 FLTS WITH THE OIL PRESSURE INDICATORS READING THE INCORRECT ENG DUE TO THE CONNECTORS TO THE INSTS BEING SWAPPED.
Narrative: PICKED UP AN ACFT IN THE MORNING AT HOME BASE. THIS BASE IS MAJOR MAINT BASE. ACFT JUST CAME OUT OF MAJOR INSPECTION. PREFLT WAS NORMAL, START NORMAL. FLEW ACFT FOR 3 FLTS AND SWAPPED IT TO ANOTHER CREW WHO FLEW IT FOR 7 FLTS, TERMINATING AT AN ON-LINE STATION. THE NEXT MORNING, THE ORIGINATING CREW DISCOVERED THAT THE OIL PRESSURE INDICATIONS WERE REVERSED. INSPECTION REVEALED THAT THE CANNON PLUGS TO THE GAUGES WERE HOOKED UP BACKWARDS. ALTHOUGH SOME MAINT WAS PERFORMED OVERNIGHT AT THE ON-LINE STATION, THE OIL PRESSURE SYS WAS NOT WORKED ON. APPARENTLY ME AND ANOTHER CAPT FLEW THAT ACFT FOR A TOTAL OF 10 FLTS WITHOUT NOTICING THAT THE OIL PRESSURE ON START CAME UP ON THE WRONG GAUGE. THE OIL PRESSURE WARNING LIGHTS ON THE ANNUNCIATOR PANEL WORKED PROPERLY, SO THE NORMAL AFTER START 'FLOW' WOULD BE CORRECT, AND WITH BOTH ENGS RUNNING, ALL PRESSURE INDICATIONS WOULD APPEAR NORMAL.
Data retrieved from NASA's ASRS site as of July 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.