NTSB Identification: NYC88FA238.
The docket is stored on NTSB microfiche number 38642.
Scheduled 14 CFR operation of PAN AM EXPRESS (D.B.A. operation of PAN AM EXPRESS )
Accident occurred Wednesday, September 21, 1988 in ALBANY, NY
Probable Cause Approval Date: 01/24/1990
Aircraft: de Havilland DH-7-58C, registration: N170RA
Injuries: 1 Serious,2 Minor,12 Uninjured.

NTSB investigators either traveled in support of this investigation or conducted a significant amount of investigative work without any travel, and used data obtained from various sources to prepare this aircraft accident report.

THE ACFT EXPERIENCED AN UNCONTAINED DISINTEGRATION OF THE NO.2 ENGINE. SCORCHED ENGINE FRAGMENTS RIPPED THROUGH THE FUSELAGE INJURING TWO PASSENGERS, ONE SERIOUSLY. THE UNCONTAINED FAILURE WAS THE RESULT OF WEAR OR SPALLING OF THE 1ST STAGE REDUCTION GEAR AND THE SUN GEARS. PROGRESSIVE CONTAMINATION ALLOWED THE FAILURE TO PROGRESS TO THE ULTIMATE UNCONTAINED FAILURE. CONTRIBUTING TO THE ULTIMATE FAILURE WAS AN INOPERATIVE MAGNETIC CHIP DETECTOR PLUG, WHICH ALLOWED THE WEAR TO PROGRESS UNDETECTED.

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

TURBINE ASSEMBLY,TURBINE BLADE..SEPARATION

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

FLUID,OIL..CONTAMINATION

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

WARNING SYSTEM(OTHER)..FAILURE,TOTAL

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

TURBINE ASSEMBLY,TURBINE BLADE..SEPARATION




Contributing Factors

LUBRICATING SYSTEM,OIL MAGNETIC PLUG..FAILURE,TOTAL

Index for Sep1988 | Index of months