 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
A DC9-30 was dispatched in non compliance with the incorrect ram air temperature engine pressure ratio indicator.
| Attributes | |
| ACN | 503138 |
| Time | |
| Date | 200103 |
| Day | Thu |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | DC-9 30 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance ground : parked |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : fcc |
| Experience | maintenance avionics : 5 maintenance repairman : 5 |
| ASRS Report | 503138 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 180 flight time total : 17200 flight time type : 6180 |
| ASRS Report | 503330 |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper maintenance maintenance problem : improper documentation non adherence : published procedure non adherence : far |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other |
| Factors | |
| Maintenance | contributing factor : schedule pressure performance deficiency : testing performance deficiency : repair performance deficiency : non compliance with legal requirements performance deficiency : installation |
| Supplementary | |
| Problem Areas | Maintenance Human Performance Aircraft Chart Or Publication Flight Crew Human Performance |
| Primary Problem | Maintenance Human Performance |
Narrative:
Pilot reported his ram air temperature was reading 28 degrees on ground at the gate (ZZZ). When I went to the aircraft, the temperature was reading 12 degrees, which was close to the temperature of the day. Xy was the mechanic assisting me at the time. He sprayed coolant on the ram air temperature probe and the temperature indicator did go down in temperature. The gauge seemed to be working alright. Both xy and I decided to change the gauge in case of a problem in the air conditioning -- the temperature problem. I was in the cockpit and xy handed me the part and I changed the indicator. When doing the part change in the logbook, I did not notice the different dash numbers of the parts. Mar/xa/01 the problem was discovered, and the part changed to the correct dash number.
Original NASA ASRS Text
Title: A DC9-30 WAS DISPATCHED IN NON COMPLIANCE WITH THE INCORRECT RAM AIR TEMP ENG PRESSURE RATIO INDICATOR.
Narrative: PLT RPTED HIS RAM AIR TEMP WAS READING 28 DEGS ON GND AT THE GATE (ZZZ). WHEN I WENT TO THE ACFT, THE TEMP WAS READING 12 DEGS, WHICH WAS CLOSE TO THE TEMP OF THE DAY. XY WAS THE MECH ASSISTING ME AT THE TIME. HE SPRAYED COOLANT ON THE RAM AIR TEMP PROBE AND THE TEMP INDICATOR DID GO DOWN IN TEMP. THE GAUGE SEEMED TO BE WORKING ALRIGHT. BOTH XY AND I DECIDED TO CHANGE THE GAUGE IN CASE OF A PROB IN THE AIR CONDITIONING -- THE TEMP PROB. I WAS IN THE COCKPIT AND XY HANDED ME THE PART AND I CHANGED THE INDICATOR. WHEN DOING THE PART CHANGE IN THE LOGBOOK, I DID NOT NOTICE THE DIFFERENT DASH NUMBERS OF THE PARTS. MAR/XA/01 THE PROB WAS DISCOVERED, AND THE PART CHANGED TO THE CORRECT DASH NUMBER.
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.