Monday, December 19, 2016

Piper PA-28R-200, N55484: Accident occurred December 16, 2016 in Kewanee, Henry County, Illinois

Aviation Accident Final Report - National Transportation Safety Board: https://app.ntsb.gov/pdf

Additional Participating Entity:
Federal Aviation Administration / Flight Standards District Office: DuPage, Illinois

Aviation Accident Factual Report -  National Transportation Safety Board:  https://app.ntsb.gov/pdf


Docket And Docket Items - National Transportation Safety Board: https://dms.ntsb.gov/pubdms


http://registry.faa.gov/N55484

NTSB Identification: GAA17CA109
14 CFR Part 91: General Aviation
Accident occurred Friday, December 16, 2016 in Kewanee, IL
Probable Cause Approval Date: 03/13/2017
Aircraft: PIPER PA28R, registration: N55484
Injuries: 2 Uninjured.

NTSB investigators used data provided by various entities, including, but not limited to, the Federal Aviation Administration and/or the operator and did not travel in support of this investigation to prepare this aircraft accident report.

The pilot reported that, en route on an instrument flight rules flight plan in instrument meteorological conditions (IMC), the airplane began accumulating ice, and shortly thereafter, he requested a “precautionary diversion” to the nearest airport to land. The pilot further reported that he exited IMC about 1,642 ft above ground level and circled over the diversion airport for landing. He reported that he had kept the flaps and landing gear retracted “to not adversely affect lift” and forgot to extend the landing gear before landing. However, when the airplane was over the runway threshold he reduced power, which caused the auto-extend function of the landing gear system to attempt to extend the landing gear. During the landing roll, the right main and nose landing gear collapsed. The airplane gradually slid off the runway to the right.

The airplane sustained substantial damage to the right wing.

The pilot reported that there were no preaccident mechanical failures or malfunctions with the airframe or engine that would have precluded normal operation.
In the Procedures section of the Piper Arrow II Pilot’s Operating Manual, it states in part:

Some aircraft are equipped with an airspeed-power sensing system (backup gear extender) which extends the landing gear under low airspeed-power conditions even though the pilot may not have selected gear down. For normal operation, the pilot should extend and retract the gear with the gear selector switch located on the instrument panel, just as he would if the backup gear extender system were not installed.

The manual also states:

The red gear warning light on the instrument panel and the horn operate simultaneously when: On aircraft equipped with the backup gear extender, when the system has lowered the landing gear and the gear selector switch is not in the down position and the throttle is not full open.

The National Transportation Safety Board determines the probable cause(s) of this accident as follows:
The pilot’s failure to extend the landing gear during the approach to land.

The pilot reported that en route on an instrument flight rules (IFR) flight plan in instrument meteorological conditions (IMC) the airplane began accumulating ice and shortly thereafter, he requested a "precautionary diversion" to the nearest airport to land. The pilot further reported that he exited IMC about 1,642 feet above ground level (agl) and circled over the diversion airport for landing. He reported that he had kept the flaps and landing gear retracted "to not adversely affect lift" and forgot to extend the landing gear prior to landing. However, when the airplane was over the runway threshold he reduced power, which caused the auto-extend function of the landing gear system to attempt to extend the landing gear. During the landing roll, the right main and nose landing gear collapsed. The airplane gradually slid off the runway to the right.

The airplane sustained substantial damage to the right wing.

The pilot reported that there were no preaccident mechanical failures or malfunctions with the airframe or engine that would have precluded normal operation.

In the Procedures section of the Piper Arrow II Pilot's Operating Manual, it states in part:

Some aircraft are equipped with an airspeed-power sensing system (backup gear extender) which extends the landing gear under low airspeed-power conditions even though the pilot may not have selected gear down. For normal operation, the pilot should extend and retract the gear with the gear selector switch located on the instrument panel, just as he would if the backup gear extender system were not installed.

The manual also states:

The red gear warning light on the instrument panel and the horn operate simultaneously when: On aircraft equipped with the backup gear extender, when the system has lowered the landing gear and the gear selector switch is not in the down position and the throttle is not full open.

No comments: