Lombardo covers business aviation maintenance-related issues. He is also a writer and on-air reporter for AINtv. He has over 3000 articles published and is the author of several books on aircraft systems for pilots and on the topic of flight simulation.
He holds undergraduate and graduate degrees in education from the University of Illinois, has taught aviation for over 35 years in industry and as a university professor and academic dean at three different universities. He is also a frequent seminar and after-dinner motivational speaker.&nbsp;
Lombardo holds an A&amp;P Certificate, ATP, CFI and Ground Instructor ratings. He was a corporate pilot and was a research pilot and flight instructor at the University of Illinois. An FAA Safety Counselor for over 25 years, he was one of the original 13 Counselors appointed to the FAA’s Airworthiness Safety Program for maintenance technicians.&nbsp;

Contributor

David A. Lombardo

MITSUBISHI MU-2B-35, HILTON HEAD, S.C., AUG. 1, 2001–The NTSB determined that the probable cause of the accident was the improper maintenance/installation and inadequate inspection of the airplane’s flap torque-tube joints during routine maintenance by company maintenance personnel. This resulted in the right-flap torque-tube assembly coupler becoming detached and the flaps developing asymmetrical lift when extended, which resulted in an uncontrolled roll, a descent and impact with a tree during approach to land.

Mitsubishi N1VY was on final approach to land at Hilton Head Airport (HXD) when it was seen by witnesses to suddenly roll to the right, descend and hit trees at about the 70-foot level, killing the pilot. A fire broke out when it hit the ground. N1VY’s debris field extended about 370 feet.

Examination of the wreckage revealed the left-wing flap actuator and jack nut measurements were consistent with the wing flaps being extended to 40 degrees, and on the right wing the flap jack nut and actuator measurements were consistent with the right flap being extended to about 20 degrees. The right-flap torque-tube assembly between the flap motor and the flap stop assembly had disconnected. The flap torque-tube assembly’s female coupler, which attaches to the male spline end of the flap motor and flap-stop assembly, was found with a cotter pin installed through the female coupler of the flap stop assembly. The cotter pin had not been placed through the spline and the coupler consistent with normal installation as per Mitsubishi’s maintenance manual, or as specified in AD 88-23-01. Instead, the cotter pin had missed the male spline on the flap motor. The flap coupler on the opposite side of the flap motor was also found without a cotter pin installed.

Company maintenance records showed that on April 3, 2001, about 87 flight hours before the accident, the airplane was inspected per Airworthiness Directive AD 88-23-01, which required the disassembly, inspection and reassembly of the flap torque-tube joints. On July 9, 2001, the airplane was given a phase 1 inspection and Bankair records showed that a company-authorized technician performed the applicable maintenance items and certified the airplane for return to service.

News and developments about airplanes, helicopters and unmanned air vehicles used in all varieties of operations, including airlines, military, business, commercial, general aviation and private.

Final Report: Maintenance Error Resulted in Asymmetric Flaps

MITSUBISHI MU-2B-35, HILTON HEAD, S.C., AUG.

2024 Corporate Aviation Leadership Summit

Jessica Reed

News and issues relating to business, corporate and private aviation, primarily regarding turbine-engine-powered airplanes and helicopters. Subjects include aircraft, engines, maintenance, operations, personnel, acquisitions, accidents, safety, security, and training.

Jo Damato and Andrew Broom assume additional responsibilities

NBAA Expands Roles for Two Senior Executives

Matt Thurber

Similarities between the piston- and jet-powered Cirruses make transition training easier

Transport Canada Certifies Cirrus SR G7 and Vision G2+

Kerry Lynch

Aircraft will be able to take off in 150 feet of runway

Electra Launches Hybrid-electric EL9 STOL Aircraft

Hanneke Weitering

First production-representative Alia CX300 takes flight

Beta Flies First Electric Airplane Produced in Vermont Factory

G700 next headed to the Bahrain International Airshow for display alongside the G500

Gulfstream’s G700 Surpasses 65 City-pair Records

Honda's secretive eVTOL program picks up steam

FAA Greenlights Honda eVTOL Flight Tests

Curt Epstein

Some models are seeing high demand, others not so much

Broker: Preowned Cessna Citation Market Remains Mixed

Charles Alcock

New developments at airports including regulations and noise issues; legal disputes; openings, acquisitions and mergers.

News and developments about aircraft engines, including turbofan, turboprop, turboshaft and piston.

More In Aircraft