NTSB CHI89FA058 — 1989-03-18 · ROCKFORD, Illinois, United States

Current FAA registration · N52634

Make / Model: CESSNA 177RG
Year of manufacture: 1977 · 12 years old at event
Engine: LYCOMING IO-360-A1B6D (200 hp)
Seats / Engines: 4 seats · 1 engine
Last airworthiness date: 19770531
ADS-B equipped: Yes — Mode-S A6A216

Source: FAA Aircraft Registry (releasable master file).

Aircraft involved

N52634 Cessna 177RG None

Probable cause & findings

THE INADEQUATE SERVICING OF THE HYDRAULIC FLUID BY MAINTENANCE PERSONNEL AND THE PILOT'S FAILURE TO EXTEND THE LANDING GEAR MANUALLY.

Factual narrative

THE MAIN LANDING GEAR COLLAPSED DURING THE ROLLOUT OF A FULL STOP LANDING. THE HYDRAULIC POWER PACK UNIT HAD BEEN REPLACED RECENTLY. THIS WAS ONLY THE SECOND FLIGHT AND SECOND LANDING SINCE THE REPLACEMENT OF THE UNIT. THE HYDRAULIC RESERVOIR WAS SLIGHTLY LESS THAN HALF FULL. GEAR OPERATION COULD NOT BE OBTAINED IN A FUNCTIONAL TEST WITH THE HYDRAULICFLUID LEVEL EXISTENT IN RESERVOIR. NORMAL GEAR FUNCTION WAS OBTAINED AFTER RESERVOIR WAS SERVICED TO OPERATING CAPACITY. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12

Verbatim from NTSB's published report. Source file NTSB_1989_CHI89FA058.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.

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