NTSB CAROL · Event
Event CHI89IA083
Registry · N434AA
FAA Aircraft Registry record.
Make / Model
ANDURIL INDUSTRIES INC ROADRUNNER
ADS-B equipped
Yes — Mode-S A531FB
Registrant of record
ANDURIL INDUSTRIES INC
Source: FAA Aircraft Registry (releasable master file).
Aircraft involved
Probable cause & findings
FAILURE OF THE HYDRAULIC POWER TRANSFER UNIT SHUT-OFF (PTU S/O) VALVE DUE TO FAILED (FATIGUED) VALVE BODY ATTACH SCREWS. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12
Verbatim from NTSB's published report. Source file
NTSB_1989_CHI89IA083.txt.
Findings + structured fields enriched from FAA avall.mdb.
Full investigation docket on
data.ntsb.gov ↗.
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