NTSB Identification: MIA96IA084.
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Nonscheduled 14 CFR operation of MILLON AIR
Incident occurred Thursday, February 22, 1996 in MIAMI, FL
Probable Cause Approval Date: 02/01/1997
Aircraft: Boeing 707-323C, registration: N751MA
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.

One hour after departure, the aircraft lost all hydraulic fluid from the utility hydraulic system. On approach to Miami, the flight engineer manually extended the main landing gear. Attempts to manually lower the nose landing gear were unsuccessful. A fly-by of the tower indicated the nose gear doors were open and the gear was retracted. The aircraft was landed in this configuration. After the incident, the aircraft was raised, and the nose landing gear was extended using the normal manual extension system. After the aircraft was taken to a hangar, the nose landing gear was retracted and manually extended 4 more times with no evidence of failure or malfunction. The utility hydraulic system relief valve housing failed due to fatigue cracking, resulting in the loss of all hydraulic fluid. The flight engineer had been flying for 21 days as a flight engineer at the operator and had accumulated 25 flight hours. He reported he had 54 total flight hours as flight engineer in the Boeing 707 and 3,800 flight hours as flight engineer in the Douglas DC-8.

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

failure of the flight engineer to follow the appropriate emergency procedure to manually extend the nose landing gear. Factors relating to the incident were: fatigue failure of the utility hydraulic system relief valve, which resulted in an inoperative normal gear extension system; the flight engineer's lack of total time in the incident aircraft; and inadequate training given by the aircraft operator.

Full narrative available

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