 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
A B727-200 on takeoff and climb had indication of low power from #1 and #3 engines returned to the field and discovered both engines PT2 probes plugged by mud dauber wasps.
| Attributes | |
| ACN | 406156 |
| Time | |
| Date | 199806 |
| Day | Thu |
| Local Time Of Day | 0001 To 0600 |
| Place | |
| Locale Reference | atc facility : ind |
| State Reference | IN |
| Altitude | msl bound lower : 3000 msl bound upper : 3000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tracon : ind |
| Operator | common carrier : air carrier |
| Make Model Name | B727-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : initial climbout : takeoff |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : flight engineer pilot : atp |
| Experience | flight time last 90 days : 86 flight time total : 4000 flight time type : 2200 |
| ASRS Report | 406156 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| ASRS Report | 406158 |
| Events | |
| Anomaly | aircraft equipment problem : critical |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
I was the first officer on a B727-200 scheduled ind-mci. Preflight, start and taxi were normal. I was the PF this leg. Setting power for takeoff, the captain announced that the throttles (#1 and #3) felt misaligned with #2. I then announced 'check N1's.' the decision was made to continue takeoff. Takeoff roll was longer than normal for an aircraft at this weight. Airborne, the captain and flight engineer analyzed the engines and determined that EPR's were extremely high on #1 and #3 for the corresponding N1, N2 and fuel flow readings. Bleed switches were properly set and engine anti-ice was 'off.' decision was made to return to ind, captain assumed control of aircraft and landed on runway 5R. Maintenance later found PT2 probes on engines #1 and #3 to be fouled with dirt dauber nests.
Original NASA ASRS Text
Title: A B727-200 ON TKOF AND CLB HAD INDICATION OF LOW PWR FROM #1 AND #3 ENGS RETURNED TO THE FIELD AND DISCOVERED BOTH ENGS PT2 PROBES PLUGGED BY MUD DAUBER WASPS.
Narrative: I WAS THE FO ON A B727-200 SCHEDULED IND-MCI. PREFLT, START AND TAXI WERE NORMAL. I WAS THE PF THIS LEG. SETTING PWR FOR TKOF, THE CAPT ANNOUNCED THAT THE THROTTLES (#1 AND #3) FELT MISALIGNED WITH #2. I THEN ANNOUNCED 'CHK N1'S.' THE DECISION WAS MADE TO CONTINUE TKOF. TKOF ROLL WAS LONGER THAN NORMAL FOR AN ACFT AT THIS WT. AIRBORNE, THE CAPT AND FE ANALYZED THE ENGS AND DETERMINED THAT EPR'S WERE EXTREMELY HIGH ON #1 AND #3 FOR THE CORRESPONDING N1, N2 AND FUEL FLOW READINGS. BLEED SWITCHES WERE PROPERLY SET AND ENG ANTI-ICE WAS 'OFF.' DECISION WAS MADE TO RETURN TO IND, CAPT ASSUMED CTL OF ACFT AND LANDED ON RWY 5R. MAINT LATER FOUND PT2 PROBES ON ENGS #1 AND #3 TO BE FOULED WITH DIRT DAUBER NESTS.
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.