NTSB CAROL · Event
Event CHI86IA115
Aircraft involved
Factual narrative
N508US WAS OPERATING AS NWA FLT 150. THE CAPTAIN STATED AFTER THE INCIDENT THAT THE FLT WAS UNEVENTFUL UNTIL LANDING. UPON LANDING AND SPOILER DEPLOYMENT, THE ACFT PITCHED UP ABRUPTLY, TO AN ATTITUDE OF 10 DEGREES. THE LANDING WAS COMPLETED WITHOUT INCIDENT. EXAMINATION OF THE ACFT REVEALED DAMAGE TO THE ACFT FUSELAGE BELLY. BOEING ISSUED A SERVICE BULLETIN STATING THAT SPOILER DEPLOYMENT ON TOUCHDOWN WOULD PRODUCE A NOSE UP AERODYNAMIC MOMENT. SOLUTIONS TO THIS OCCURRENCE IS A MODIFICATION TO THE SPOILER DEPLOYMENT AND USE OF AUTO BRAKING DURING LANDING. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12
Verbatim from NTSB's published report. Source file
NTSB_1986_CHI86IA115.txt.
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