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Atlas / NTSB / LAX85IA023

NTSB CAROL · Event

Event LAX85IA023

1984-10-17 LAS VEGAS, Nevada, United States None 1 aircraft Status: Completed

Registry · N722AA

FAA Aircraft Registry record.

Make / Model

CESSNA 172M

Year of manufacture

1972 · 12 years old at event

Engine

LYCOMING 0-320 SERIES (180 hp)

Seats / Engines

4 seats · 1 engine

Last airworthiness date

19721220

ADS-B equipped

Yes — Mode-S A9AAFB

Registrant of record

ROBINSON CHARLES F JR

Source: FAA Aircraft Registry (releasable master file).

Aircraft involved

Factual narrative

AN UNCOMMANDED DEPLOYMENT OF THE #8 LEADING EDGE SLAT OCCURRED DURING A CLIMB. CONTROL OF THE ACFT WAS NOT AFFECTED & THE FLT CONTINUED TO THE DESTINATION. THE CREW ATTEMPT TO RECYCLE THE SLATS, BUT TO NO AVAIL. AN EXAM OF THE #8 SLAT ACTUATOR DID NOT DISCLOSE A MALFUNCTION OR FAILURE. HOWEVER, BOEING DID REPORT THE ACTUATOR RETRACT LOCK SWITCH DISPLAYED EVIDENCE OF AN INTERMITTENT MALFUNCTION THAT COULD HAVE FALSELY INDICATED THAT THE ACTUATOR WAS RETRACTED, WHEN IN REALITY IT HAD NOT. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12

Verbatim from NTSB's published report. Source file NTSB_1984_LAX85IA023.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.