NTSB Releases Incident Report that Caused AA5 SB | Aero-News Network
Aero-News Network
RSS icon RSS feed
podcast icon MP3 podcast
Subscribe Aero-News e-mail Newsletter Subscribe

Airborne Unlimited -- Most Recent Daily Episodes

Episode Date

Airborne-Monday

Airborne-Tuesday

Airborne-Wednesday Airborne-Thursday

Airborne-Friday

Airborne On YouTube

Airborne-Unlimited-05.20.24

Airborne-NextGen-05.21.24

Airborne-Unlimited-05.22.24 Airborne-FlightTraining-05.23.24

Airborne-Unlimited-05.24.24

Fri, Apr 21, 2023

NTSB Releases Incident Report that Caused AA5 SB

Tail Failure Results In Landing Accident

Location: Leesburg, Virginia, Accident Number: ERA21LA106
Date & Time: January 19, 2021, 10:55 Local, Aircraft: N5880L
Event: Flight control sys malf/fail, Injuries: None
Flight Conducted Under: Part 91: General Aviation - Instructional

An investigation report regarding a scary flight lesson in an American AA5 has been released, describing a crippled left elevator that collapsed from its outboard support assembly.

The report describes a routine training flight between a CFI and student, proceeding normally until the “airplane began shaking and buffeting violently and loudly. The control yoke was also shaking violently (left, right, fore, and aft), and the airplane was pitching up and down.” The instructor declared an emergency, hearing from a nearby aircraft that the AA5’s elevator was “flapping in the wind.” Luckily, the CFI managed to bring it home safely, though the aircraft incurred a nosegear collapse upon landing with such ineffectual rudder authority.

Post accident investigation showed that “left elevator remained attached to the bellcrank and supported at the inboard support bearing assembly, but the outboard support bearing assembly was separated from the outer rib of the left horizontal stabilizer, leaving the elevator displaced down from its normal position. The outboard support bearing assembly and a separated aft section of the outboard rib of the left stabilizer were not located or recovered. Relatively coarse striations intermixed with dimple features, consistent with cyclic overstress loading, were noted on the fractured outer rib of the left horizontal stabilizer.”

It’s unclear how much damage was incurred on the flight back, with the aft spar of the left horizontal stabilizer buckled. The NTSB believed it was the result of up and downward overstress incurred as the elevator experienced such harsh flutter throughout the descent. Overall, the primary cause appeared to be simple age, as the AA5 was more than 45 years old. Further examination of the horizontal stabilizer showed multiple cracks at the upper and lower bondlines, as well as bondline separation on the left and right sides. 

The end result was the issuance of a Service Bulletin, number 195, that required inspections on the wings, stabs, and fuselage to detect bonding separations in a similar vein.

FMI: www.data.ntsb.gov

Advertisement

More News

Aero-News: Quote of the Day (05.25.24)

“Warbirds in Review features veterans, aviation legends, and aircraft that simply cannot be seen together in one place anywhere else in the world. Many of these veterans main>[...]

Airborne 05.22.24: NS-25 Chute Failure, #HonorTheWASP, SkyCourier 'Combi'

Also: VAI v Anti-Heli Actions, Electric Aircraft Symposium, 2024 FAA Drone/AAM Symposium, Gravitymaster Blue Origin's seventh passenger flight ended with a smidgeon of drama when o>[...]

Aero-News: Quote of the Day (05.26.24)

“The importance of this YF-16 paint scheme is celebrating 50 years of the F-16 Viper. Everyone at Edwards has a big sense of pride for not only supporting the Viper Demo Team>[...]

ANN's Daily Aero-Linx (05.26.24)

Aero Linx: National Aeronca Association We are dedicated to supporting the design and preserving the history of Aeronca aircraft. Founded by Jim Thompson and fostered by his leader>[...]

Klyde Morris (05.24.24)

Klyde Sounds Like He's Defining An 'Influencer' FMI: www.klydemorris.com>[...]

blog comments powered by Disqus



Advertisement

Advertisement

Podcasts

Advertisement

© 2007 - 2024 Web Development & Design by Pauli Systems, LC