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A B767-200 in cruise at FL410 had a right pneumatic duct leak light caused by a cracked pneumatic duct.
| Attributes | |
| ACN | 383570 |
| Time | |
| Date | 199709 |
| Day | Mon |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : nas |
| State Reference | FO |
| Altitude | msl bound lower : 41000 msl bound upper : 41000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zma tower : sfo |
| Operator | common carrier : air carrier |
| Make Model Name | B767-200 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial pilot : atp |
| Experience | flight time last 90 days : 225 flight time total : 14000 flight time type : 4100 |
| ASRS Report | 383570 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : commercial pilot : flight engineer pilot : instrument |
| Experience | flight time last 90 days : 240 flight time total : 16500 flight time type : 600 |
| ASRS Report | 382035 |
| Events | |
| Anomaly | aircraft equipment problem : critical other anomaly other |
| Independent Detector | other flight crewa other other : unspecified cockpit |
| Resolutory Action | none taken : detected after the fact |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | Pilot Deviation |
Narrative:
In cruise at FL410 we had a duct leak light and status message indicating a bleed air leak in our right pneumatic system. We completed the appropriate checklist and all indications went away. After 10-15 mins we put all switches back to normal to see if this was possibly a nuisance light. The flight was normal with no further indications for the remaining time (2 hours 20 mins). After landing, we briefed maintenance of the problem and actions taken. We went into crew rest and found out later that the next flight was canceled due to a leak in the duct. Although we took care of the problem correctly and reported it to maintenance upon arrival, we did not enter the information in the aircraft logbook. Looking back on the situation now, there was no reason not to do this since we briefed maintenance and obviously they were going to check the aircraft.
Original NASA ASRS Text
Title: A B767-200 IN CRUISE AT FL410 HAD A R PNEUMATIC DUCT LEAK LIGHT CAUSED BY A CRACKED PNEUMATIC DUCT.
Narrative: IN CRUISE AT FL410 WE HAD A DUCT LEAK LIGHT AND STATUS MESSAGE INDICATING A BLEED AIR LEAK IN OUR R PNEUMATIC SYS. WE COMPLETED THE APPROPRIATE CHKLIST AND ALL INDICATIONS WENT AWAY. AFTER 10-15 MINS WE PUT ALL SWITCHES BACK TO NORMAL TO SEE IF THIS WAS POSSIBLY A NUISANCE LIGHT. THE FLT WAS NORMAL WITH NO FURTHER INDICATIONS FOR THE REMAINING TIME (2 HRS 20 MINS). AFTER LNDG, WE BRIEFED MAINT OF THE PROB AND ACTIONS TAKEN. WE WENT INTO CREW REST AND FOUND OUT LATER THAT THE NEXT FLT WAS CANCELED DUE TO A LEAK IN THE DUCT. ALTHOUGH WE TOOK CARE OF THE PROB CORRECTLY AND RPTED IT TO MAINT UPON ARR, WE DID NOT ENTER THE INFO IN THE ACFT LOGBOOK. LOOKING BACK ON THE SIT NOW, THERE WAS NO REASON NOT TO DO THIS SINCE WE BRIEFED MAINT AND OBVIOUSLY THEY WERE GOING TO CHK THE ACFT.
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.