Buffalo C-46 at Deline.

[Siddley Hawker]

Is there a hydraulic pump on each engine on the 46?

[7ECA]

Is there a hydraulic pump on each engine on the 46?

Hydraulic System:
There are two hydraulic systems in the plane, the main system and the booster system. These are connected by a cross-over valve. The main system has a normal pressure of 1050 to 1350 pounds per square inch (psi), which is maintained by two engine-driven pumps. This system operates landing gear, brakes, cowl flaps, wing flaps and the automatic pilot.

[Siddley Hawker]

Ok, thanks for that.

[co-joe]

Both those past scenarios are plausible....AND SCARY AS HELL!

Great work getting her down safe. SAFE!

...and nothing else matters.

[C-FABH]

TSB Occurrence #A15W0149

The Buffalo Airways Curtiss C46A-45CU (C-GTXW) was operating as flight BFL525 from Yellowknife, NT (CYZF) to Norman Wells, NT (CYVQ). While en route, approximately 140 nautical miles southeast of CYVQ at 6 500 feet above sea level (ASL), the crew noticed a drop in the right engine oil quantity indicator in conjunction with a propeller overspeed. The propeller pitch was adjusted to control the overspeed however, oil quantity indication continued to drop rapidly. A visual confirmation of the right engine nacelle confirmed that oil was escaping via the engine breather vent at an abnormally high rate. The right propeller speed became uncontrollable and the crew completed the “Prop overspeed drill”. However, the propeller (HAMILTON STANDARD, 23E50-505) did not feather as selected. Several additional attempts were made to feather the propeller before it eventually feathered. The engine (PRATT & WHITNEY-USA, R-2800-51M3) was secured and the shutdown checklist completed. The crew elected to divert to Tulita, NT (CZFN), but quickly determined that the descent rate would not permit that as an option. The only other option for diversion was Deline, NT (CYWJ) where weather was reported at ½ mile visibility and 300 feet ceiling. An emergency was declared with Deline radio. BFL525 was able to land at CYWJ however, the landing gear was not selected down to prevent further loss of airspeed resulting in a belly landing approximately midpoint of Runway 08. The aircraft continued off the end of the runway coming to a stop approximately 700 feet beyond the threshold. The crew evacuated the aircraft sustaining no injuries however, the aircraft was destroyed. Buffalo Airways’ initial investigation revealed the engine oil scavenge pump had failed.

[C-FABH]

double post

[Jimmy2]

Scary that they can't maintain altitude with an engine out and the prop feathered.

[fish4life]

Not just scary it is completely unacceptable in this day an age. Time to pull any grandfather clauses.

[Donald]

It's a little concerning that Buffalo operates 705 category aircraft, that have twice in the past two years been unable to sustain flight with an engine out.

Time to retire the old birds?

[Donald]

I wonder how overweight this one was?

[Longtimer]

Scary that they can't maintain altitude with an engine out and the prop feathered.

That does raise the question of weight. The aircraft was / is certified to be able to maintain level flight on one engine but that was of course if the Max weight was not exceeded or of course if the remaining engine was operating at peak performance.

[switchflicker]

And the airframe itself is straight, true and clean of parasitic drag. None of which apply to any airplane as old as these are.

[Mick G]

Hi all. New on this forum. Curious if anybody knows if GTXW is officialy a write off or what (if any) plan remain for it? Also if GTPO is going to be put back in use?