Straight 170 (Raqwing) Accident - Fuel Pump?
Posted: Sun Nov 29, 2020 10:50 pm
While researching the fuel pump/check-valve requirement for Straight (so-called “Ragwing”) 170 I’ve come upon a 2017 accident some might recall in Fl which was very strange for several reasons.
It was a “Ragwing”. It was operated by an experienced ATC Controller/Pilot. It killed all four aboard (husband, wife, 2 children), it was good weather with only slightly gusty winds, and at least 20 aircraft overflew the wreck while departing without noticing it despite the ELT working properly. The flight departed on a clear day at 3:10 PM but the wreck was not noticed until the next day.
At the bottom is the link and pics of the sad tragedy.
What caught my attention and causes me to bring it up is the fact that only this last week ... for the umpteenth time.... I’ve come across another 170 which has been flying for some time and numerous annual inspections with no fuel pump and no approval for it’s removal. The airplane had a fairly recent engine replacement yet because the replacement engine came off a 170-B having no fuel pump.... it was installed on the Ragwing with no fuel pump. What could possibly be wrong?
Anyway, the history of this problem is rife with errors. Some will recall the time I was contacted by a 3-way partnership in a Ragwing, the partnership being made up of FAA Inspectors in OKC... who had flown their ragwing for years with no fuel pump. They had no idea....
A&P/AI types often overlook the fact that the TCDS item 104 requires that pump, ... Every Annual Inspection is supposed to confirm that the aircraft conforms to it’s Type Certificate....and contributing to the error, the Aircraft Illustrated Parts Catalog (IPC) doesn’t list or show it!.... NOR does the ENGINE IPC! If one were to restore a Ragwing and go looking for the required pump GOOD LUCK finding the correct part number for the pump so you can order it. It’s NOT going to be listed in either IPC. And Continental correctly thinks it’s an AIRFRAME part, While Cessna thinks it’s on the ENGINE... and FAA is unfamiliar with the issue... and NTSB reports the pilot must have simply STALLED the airplane on takeoff.
WHY would an experienced commercial rated pilot stall an airplane on takeoff? ... perhaps out of SHOCK when the engine suddenly loses power in a steep climb, ya’ think? (Anyone ever practice this maneuver? If you are in a high angle-of-attack and the engine suddenly loses power you’d better be QUICK to get that NOSE DOWN or you WILL stall! And, BTW, the ragwing is not required ..and none I know of.... have a stall indicator.)
If this accident airplane did not have the required pump and check valve and plumbing I seriously doubt the Engine and Airframe Reps at the investigation or the FAA or the NTSB would ever think to look for it. No mention of a fuel pressure gauge either which might accompany a pump installation.... And the condition of that engine compartment after the crash is not likely to draw attention to that issue. As the old Navy Aviator song ends....”So What could be Fairer, than to call it Pilot Error..?”
http://www.kathrynsreport.com/2017/04/c ... 0462801053
It was a “Ragwing”. It was operated by an experienced ATC Controller/Pilot. It killed all four aboard (husband, wife, 2 children), it was good weather with only slightly gusty winds, and at least 20 aircraft overflew the wreck while departing without noticing it despite the ELT working properly. The flight departed on a clear day at 3:10 PM but the wreck was not noticed until the next day.
At the bottom is the link and pics of the sad tragedy.
What caught my attention and causes me to bring it up is the fact that only this last week ... for the umpteenth time.... I’ve come across another 170 which has been flying for some time and numerous annual inspections with no fuel pump and no approval for it’s removal. The airplane had a fairly recent engine replacement yet because the replacement engine came off a 170-B having no fuel pump.... it was installed on the Ragwing with no fuel pump. What could possibly be wrong?
Anyway, the history of this problem is rife with errors. Some will recall the time I was contacted by a 3-way partnership in a Ragwing, the partnership being made up of FAA Inspectors in OKC... who had flown their ragwing for years with no fuel pump. They had no idea....
A&P/AI types often overlook the fact that the TCDS item 104 requires that pump, ... Every Annual Inspection is supposed to confirm that the aircraft conforms to it’s Type Certificate....and contributing to the error, the Aircraft Illustrated Parts Catalog (IPC) doesn’t list or show it!.... NOR does the ENGINE IPC! If one were to restore a Ragwing and go looking for the required pump GOOD LUCK finding the correct part number for the pump so you can order it. It’s NOT going to be listed in either IPC. And Continental correctly thinks it’s an AIRFRAME part, While Cessna thinks it’s on the ENGINE... and FAA is unfamiliar with the issue... and NTSB reports the pilot must have simply STALLED the airplane on takeoff.
WHY would an experienced commercial rated pilot stall an airplane on takeoff? ... perhaps out of SHOCK when the engine suddenly loses power in a steep climb, ya’ think? (Anyone ever practice this maneuver? If you are in a high angle-of-attack and the engine suddenly loses power you’d better be QUICK to get that NOSE DOWN or you WILL stall! And, BTW, the ragwing is not required ..and none I know of.... have a stall indicator.)
If this accident airplane did not have the required pump and check valve and plumbing I seriously doubt the Engine and Airframe Reps at the investigation or the FAA or the NTSB would ever think to look for it. No mention of a fuel pressure gauge either which might accompany a pump installation.... And the condition of that engine compartment after the crash is not likely to draw attention to that issue. As the old Navy Aviator song ends....”So What could be Fairer, than to call it Pilot Error..?”
http://www.kathrynsreport.com/2017/04/c ... 0462801053