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NTSB Report
October 26, 1984 · Swearingen SA226TC · N511SS
Tulsa, OK
Overview
Report Status
Preliminary report
Event Type
Incident
Date
October 26, 1984
Injury Outcomes
No injuries (9 uninjured)
Location
Tulsa, OK
Aircraft
Swearingen SA226TC
Tail Number
N511SS
Operator
Scheduled Skyways
Injuries
None
Aircraft Damage
Minor
NTSB Number
FTW85IA028
DURING CRUISE, THE CREW EXPERIENCED A LOSS OF HYDRAULIC PRESSURE & SMOKE IN THE COCKPIT, THEN DONNED THEIR OXYGEN MASKS.THEY USED THE EMERG GEAR EXTENSION SYSTEM & MADE A SAFE EMERG LANDING. AN EXAM REVEALED A CRACKED 2000 PSI ALUMINUM HYDRAULIC LINE HAD SPRAYED FLUID IN THE COCKPIT. A RECENTLY ISSUED SERVICE BULLETIN RECOMMENDED REPLACEMENT OF THAT LINE, BUT PARTS WERE REPORTEDLY NOT AVAILABLE. LONGITUDINAL SCRATCHES WERE FOUND ALONG THE LENGTH OF THE LINE. FAILURE HAD OCCURRED AT A LONGITUDINAL SCRATCH AT A BEND IN THE LINE.
Full Narrative
DURING CRUISE, THE CREW EXPERIENCED A LOSS OF HYDRAULIC PRESSURE & SMOKE IN THE COCKPIT, THEN DONNED THEIR OXYGEN MASKS.THEY USED THE EMERG GEAR EXTENSION SYSTEM & MADE A SAFE EMERG LANDING. AN EXAM REVEALED A CRACKED 2000 PSI ALUMINUM HYDRAULIC LINE HAD SPRAYED FLUID IN THE COCKPIT. A RECENTLY ISSUED SERVICE BULLETIN RECOMMENDED REPLACEMENT OF THAT LINE, BUT PARTS WERE REPORTEDLY NOT AVAILABLE. LONGITUDINAL SCRATCHES WERE FOUND ALONG THE LENGTH OF THE LINE. FAILURE HAD OCCURRED AT A LONGITUDINAL SCRATCH AT A BEND IN THE LINE.
Flight
Event TypeIncident
Event Time08:24 CDT
Nearest AirportTulsa Intl' (0nm N)
Runway26
Runway Length7700 ft
Runway Width150 ft
Flight Plan FiledIFR
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftSwearingen SA226TC
Tail NumberN511SS
Aircraft CategoryAir
DamageMinor
OperatorScheduled Skyways
Operating RulePart 135
Engines2
Engine TypeTurboprop
Engine DetailsAiresearch · TPE 331 · Turboprop · 940
Seats24
People & Injuries
Injury SummaryNo injuries (9 uninjured)
Fatal0
Serious0
Minor0
Uninjured9
Total9
Crew 1Age 27 · First Class
Conditions
ConditionsIMC
LightDaylight
WindCalm
Visibility2 sm
CeilingOvercast 1300 ft
Temperature / Dew Point57 / 57
Altimeter30.00 inHg
Observation Time13:50
Weather SourceWFAC