LJDRVR
Well-known member
- Joined
- Nov 26, 2001
- Posts
- 1,134
With over 2000 hours behind the TFE731, I've had the following issues:
Precautionary shutdown during approach for T/R unlock light on a Lear 35. Faulty lower DPI switch. (Banged on it with fist and light extinguished.) Crappy Aeroncas and poor maintainance. (At a 135 operator, imagine that!)
Lear 35, FL410, cabin fills with whitish smoke, no abnormal indications or annunciators. 7 minutes later we're rolling out at Philly with the fire trucks. Number two bearing failed and threw oil into the breather tube, oil coked off and filled cabin with smoke.
Lear 55, 10-15% up and down engine surge on number one during climb through mid-twenties, switched to manual on fuel computer. RTB. Faulty N2 pickup.
Somebody had mentioned icing in the pneumatics. Correct me if I'm remembering this wrong, I don't fly the Lear anymore. If the fuel computers is turned off, the FCU is evacuated of fuel. The resulting decrease in pressure and temperature can result in P-3 icing. Loss of P-3 air opens the fuel metering pin, and the engine will runaway. (Without full overspeed protection, as the the computer is off.) And yet you'll still find folks who think it's cool to save fuel on the descent by turning the fuel computers off.
The only "real" engine failure I ever had the Lear was a CJ610 that flamed out.
Precautionary shutdown during approach for T/R unlock light on a Lear 35. Faulty lower DPI switch. (Banged on it with fist and light extinguished.) Crappy Aeroncas and poor maintainance. (At a 135 operator, imagine that!)
Lear 35, FL410, cabin fills with whitish smoke, no abnormal indications or annunciators. 7 minutes later we're rolling out at Philly with the fire trucks. Number two bearing failed and threw oil into the breather tube, oil coked off and filled cabin with smoke.
Lear 55, 10-15% up and down engine surge on number one during climb through mid-twenties, switched to manual on fuel computer. RTB. Faulty N2 pickup.
Somebody had mentioned icing in the pneumatics. Correct me if I'm remembering this wrong, I don't fly the Lear anymore. If the fuel computers is turned off, the FCU is evacuated of fuel. The resulting decrease in pressure and temperature can result in P-3 icing. Loss of P-3 air opens the fuel metering pin, and the engine will runaway. (Without full overspeed protection, as the the computer is off.) And yet you'll still find folks who think it's cool to save fuel on the descent by turning the fuel computers off.
The only "real" engine failure I ever had the Lear was a CJ610 that flamed out.