SF340 flight crew report bleed fault and high itt during approach. The same crew had written up the ...

Narrative:

We were repositioning the aircraft and we had just been cleared for the visual approach; and were just starting to level off at 4000 ft. I noticed the # 1 engine itt go to 771C with the power set 40% torque. There was a large delta T shift between number 1 (771C) and 2 (approx 680C); #2 being already on derivative power. A second later the left bleed fault and bleed valve light illuminated with the master caution. The weather conditions were VMC with the outside air temperature at +15C. At this time we were already on final approach and decided to land the aircraft. After the itt spike engine inductions returned to normal and the aircraft landed with no other abnormal indications. After clearing the runway and after the after landing checklist I ran the non-normal checklist for the left bleed fault/closed. We taxed to the gate and maintenance control was contacted. The number engine 1 had been checked out by maintenance that morning using a boroscope and engine run up. Corrective action was in the log and we were repositioning the aircraft back to base.

Original NASA ASRS Text

Title: SF340 flight crew report bleed fault and high ITT during approach. The same crew had written up the aircraft the previous day for the same problem and maintenance had cleared the logbook.

Narrative: We were repositioning the aircraft and we had just been cleared for the visual approach; and were just starting to level off at 4000 FT. I noticed the # 1 engine ITT go to 771C with the power set 40% torque. There was a large delta T shift between number 1 (771C) and 2 (approx 680C); #2 being already on derivative power. A second later the left bleed fault and bleed valve light illuminated with the master caution. The weather conditions were VMC with the outside air temperature at +15C. At this time we were already on final approach and decided to land the aircraft. After the ITT spike engine inductions returned to normal and the aircraft landed with no other abnormal indications. After clearing the runway and after the after landing checklist I ran the non-normal checklist for the left bleed fault/closed. We taxed to the gate and Maintenance Control was contacted. The number engine 1 had been checked out by maintenance that morning using a boroscope and engine run up. Corrective action was in the log and we were repositioning the aircraft back to base.

Data retrieved from NASA's ASRS site as of April 2012 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.

Attributes
ACN	838501
Time
Date	200906
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	SF 340B
Operating Under FAR Part	Part 91
Flight Phase	Initial Approach
Route In Use	Visual Approach
Component
Aircraft Component	Turbine Engine
Person 1
Function	Pilot Flying First Officer
Experience	Flight Crew Last 90 Days 11 Flight Crew Total 1700 Flight Crew Type 1250
Person 2
Function	Pilot Not Flying Captain
Events
Anomaly	Aircraft Equipment Problem Critical

SF340 flight crew report bleed fault and high itt during approach. The same crew had written up the aircraft the previous day for the same problem and maintenance had cleared the logbook.