NTSB Identification: SEA88IA121.
The docket is stored on NTSB microfiche number 37159.
Nonscheduled 14 CFR operation of EMERY AIR FREIGHT (D.B.A. ROSENBALM AVIATION )
Incident occurred Thursday, June 30, 1988 in SEATTLE, WA
Probable Cause Approval Date: 01/25/1990
Aircraft: MCDONNELL DOUGLAS DC-8-73F, registration: N791FT
Injuries: 4 Uninjured.

NTSB investigators used data provided by various sources and may not have traveled in support of this investigation to prepare this aircraft incident report.

CREW NOTED INFLIGHT INDICATIONS OF LOSS OF HYDRAULIC FLUID, THEN CARRIED OUT STANDARD PROCEDURES PER CREW MANUAL. EMERG HYD SYS USED TO LOWER FLAPS FOR LNDG. ACFT LANDED WITH FOUR RIGHT BRAKES LOCKED. THE TIRES BLEW AND THE WHEELS WERE GROUND FLAT. INVESTIGATION REVEALED A RUPTURED #3 HYDRAULIC PUMP PRESSURE LINE AND AN IMPROPERLY RIGGED EMERGENCY HYDRAULIC PUMP CONTROL ARM.

The National Transportation Safety Board determines the probable cause(s) of this incident to be:

HYDRAULIC SYSTEM,LINE..RUPTURED

The National Transportation Safety Board determines the probable cause(s) of this incident to be:

HYDRAULIC SYSTEM,BYPASS VALVE..BLOCKED(PARTIAL)

The National Transportation Safety Board determines the probable cause(s) of this incident to be:

MAINTENANCE,ADJUSTMENT..IMPROPER..COMPANY MAINTENANCE PERSONNEL


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