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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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B737-300 has an acrid smell in the cockpit so the captain diverts to his maintenance base at oak. The odor comes from an electrical panel. Inside the panel is the pack controller that has a defective diode.
| Attributes | |
| ACN | 356570 |
| Time | |
| Date | 199612 |
| Day | Tue |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : czq |
| State Reference | CA |
| Altitude | msl bound lower : 35000 msl bound upper : 35000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zoa |
| Operator | common carrier : air carrier |
| Make Model Name | B737-300 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | cruise other descent other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : instrument pilot : atp pilot : commercial |
| Experience | flight time last 90 days : 80 flight time total : 10000 flight time type : 7500 |
| ASRS Report | 356570 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Events | |
| Anomaly | aircraft equipment problem : critical other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : unable |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
Acrid smell in cockpit coming from first officer's overhead area. Diverted to maintenance base oak for aircraft change. Maintenance later found residual odor in P-5-10 panel (pack controller), suspect a diode burned up. After further discussion, this may be a recurring problem. Suggest boeing look at this diode.
Original NASA ASRS Text
Title: B737-300 HAS AN ACRID SMELL IN THE COCKPIT SO THE CAPT DIVERTS TO HIS MAINT BASE AT OAK. THE ODOR COMES FROM AN ELECTRICAL PANEL. INSIDE THE PANEL IS THE PACK CTLR THAT HAS A DEFECTIVE DIODE.
Narrative: ACRID SMELL IN COCKPIT COMING FROM FO'S OVERHEAD AREA. DIVERTED TO MAINT BASE OAK FOR ACFT CHANGE. MAINT LATER FOUND RESIDUAL ODOR IN P-5-10 PANEL (PACK CTLR), SUSPECT A DIODE BURNED UP. AFTER FURTHER DISCUSSION, THIS MAY BE A RECURRING PROB. SUGGEST BOEING LOOK AT THIS DIODE.
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.