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An air carrier DC10 crew solved their aircraft equipment problem blown pneumatic duct and engine fire warning rather than return land.
| Attributes | |
| ACN | 336829 |
| Time | |
| Date | 199605 |
| Day | Fri |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : iah |
| State Reference | TX |
| Altitude | msl bound lower : 2000 msl bound upper : 2000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : iah |
| Operator | common carrier : air carrier |
| Make Model Name | DC-10 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other |
| Flight Phase | climbout : initial cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | observation : company check pilot oversight : pic |
| Qualification | pilot : atp pilot : cfi pilot : commercial pilot : flight engineer pilot : instrument |
| Experience | flight time last 90 days : 120 flight time total : 10000 flight time type : 4000 |
| ASRS Report | 336829 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain instruction : trainee |
| Qualification | pilot : atp |
| Events | |
| Anomaly | aircraft equipment problem : less severe |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course flight crew : overcame equipment problem |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
#3 engine fire warning shortly after takeoff. Slats extended -- flaps retracted. Leveled aircraft at 6000 ft MSL and copilot (DC10 flight instructor, giving first leg of IOE to MD80 transition captain) and flight engineer (experienced DC10) initiated engine fail/fire checklist. Captain flew aircraft, handled radios. While retarding #3 throttle through 60-70 percent N1, engine fire light went out. Engine fire system tested ok. Contacted ATC and received delay vector back toward iah. Continued flight with #3 engine at 67 percent N1 as per checklist. Did not dump fuel. Contacted maintenance control on VHF who concurred that it was pneumatic problem. Copilot and flight engineer troubleshot pneumatic system #1, #2 and #3 and suspected failure to be blown high pressure pneumatic duct between #3 engine and #3 engine bleed valve. (5 min delay for trouble shooting). With agreement from maintenance control, added power on #3 engine to maximum continuous thrust for 5 mins with no fire warning indication. Fire warning system tested good and crew elected to evaluate system while continuing on to london. Upon arrival london, found #3 engine 8TH stage duct blown. Flight was normal in all other respects.
Original NASA ASRS Text
Title: AN ACR DC10 CREW SOLVED THEIR ACFT EQUIP PROB BLOWN PNEUMATIC DUCT AND ENG FIRE WARNING RATHER THAN RETURN LAND.
Narrative: #3 ENG FIRE WARNING SHORTLY AFTER TKOF. SLATS EXTENDED -- FLAPS RETRACTED. LEVELED ACFT AT 6000 FT MSL AND COPLT (DC10 FLT INSTRUCTOR, GIVING FIRST LEG OF IOE TO MD80 TRANSITION CAPT) AND FE (EXPERIENCED DC10) INITIATED ENG FAIL/FIRE CHKLIST. CAPT FLEW ACFT, HANDLED RADIOS. WHILE RETARDING #3 THROTTLE THROUGH 60-70 PERCENT N1, ENG FIRE LIGHT WENT OUT. ENG FIRE SYS TESTED OK. CONTACTED ATC AND RECEIVED DELAY VECTOR BACK TOWARD IAH. CONTINUED FLT WITH #3 ENG AT 67 PERCENT N1 AS PER CHKLIST. DID NOT DUMP FUEL. CONTACTED MAINT CTL ON VHF WHO CONCURRED THAT IT WAS PNEUMATIC PROB. COPLT AND FE TROUBLESHOT PNEUMATIC SYS #1, #2 AND #3 AND SUSPECTED FAILURE TO BE BLOWN HIGH PRESSURE PNEUMATIC DUCT BTWN #3 ENG AND #3 ENG BLEED VALVE. (5 MIN DELAY FOR TROUBLE SHOOTING). WITH AGREEMENT FROM MAINT CTL, ADDED PWR ON #3 ENG TO MAX CONTINUOUS THRUST FOR 5 MINS WITH NO FIRE WARNING INDICATION. FIRE WARNING SYS TESTED GOOD AND CREW ELECTED TO EVALUATE SYS WHILE CONTINUING ON TO LONDON. UPON ARR LONDON, FOUND #3 ENG 8TH STAGE DUCT BLOWN. FLT WAS NORMAL IN ALL OTHER RESPECTS.
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.