Individually Owned: 150,657
Corporate Owned: 137,281
Yeager Airport
Aircraft Accident/Incident Report
Charleston, West Virginia 25301
Thursday, April 14, 1988 9:45 EDT
NTSB Narrative Summary Released at Completion of Accident
THE ACFT WAS AT FLIGHT LEVEL 310, WHEN THE NO. 2 ENGINE FIRST STAGE TURBINE DISC SEPARATED, CAUSING AN UNCONTAINED ENGINE FAILURE. TURBINE DEBRIS PENETRATED THE FUSELAGE STRUCTURE & CAUSED DEPRESSURIZATION. THE PLT MADE AN EMERGENCY DESCENT & LANDED AT CHARLESTON, WV, WHICH WAS ABOUT 50 MILES AWAY. THE INVESTIGATION REVEALED SEVERE RUBBING & MELTING OF THE LOW PRESSURE TURBINE INTERSTAGE SEAL & SEPARATION OF THE DRIVE FLANGES CONNECTING THE LP1 & LP2 TURBINE DISCS. ROLLS-ROYCE REPAIR SCHEME XRS 3505 DESCRIBES A PROCEDURE FOR REPAIR OF THE INTERSTAGE SEALS. HOWEVER, IN REPLACING THE SEALS, THE REPAIR FACILITY USED MACHINING REFERENCE SURFACES WHICH DIFFERED FROM THOSE IN THE REPAIR SCHEME. ROLLS-ROYCESUBSEQUENTLY AMENDED XRS 3505 TO MAKE IT MORE TOLERABLE TO RUBBING OR MISASSEMBLY OF THE LOW PRESSURE TURBINE SEAL. ALL OF THE FIRST CLASS SECTION & TWO CABIN SECTION PASSENGER OXYGEN MASKS FAILED TO DEPLOY.
NTSB Probable Cause Narrative
ENGINE AND AIRFRAME FAILURE WERE CAUSED BY THE THE SEPARATION OF THE FIRST STAGE LOW PRESSURE TURBINE DISK. THE DISC INTERSTAGE SEAL WAS INSTALLED INADEQUATELY, RESULTING IN RUBBING BETWEEN THE SEAL AND DISK, CAUSING FAILURE OF THE DISK. INADEQUATE PROCEDURE BY MAINTENANCE PERSONNEL ARE A CONTRIBUTING FACTOR.
Event Information
| Type of Event | Accident |
| Event Date | 4/14/1988 |
| Event Day of the Week | Thursday |
| Time of Event | 945 |
| Event Time Zone | Eastern Daylight Time |
| Event City | CHARLESTON |
| Event State | WEST VIRGINIA |
| Event Country | -- |
| Zipcode of the event site | 25301 |
| Event Date Year | 1988 |
| Event Date Month | 4 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | |
| Event Location Longitude | |
| Event Location Airport | YEAGER |
| Event Location Nearest Airport ID | CRW |
| Indicates whether the acc/inc occurred off or on an airport | Off Airport/Airstrip |
| Distance from airport in statute miles | 0 |
| Degrees magnetic from airport | 0 |
| Airport Elevation | 982 |
| Weather Briefing Completeness | Not pertinent |
| Investigator's weather source | Weather Observation Facility |
| Time of the weather observation | 950 Eastern Daylight Time |
| Direction of event from weather observation facility (degrees) | 360 |
| Weather Observation Facility ID | CRW |
| Elevation of weather observation facility | 982 |
| Distance of event from weather observation facility (units?) | 50 |
| Time Zone of the weather observation | EDT |
| Lighting Conditions | Day |
| Lowest Ceiling Height | 25000 |
| Lowest Non-Ceiling Height | 0 |
| Sky/Lowest/Cloud Conditions | Unknown |
| Sky Condition for Lowest Ceiling | Overcast |
| Visibility Runway Visual Range (Feet) | 0 |
| Visibility Runway Visual Value (Statute Miles) | 0 |
| Visibility (Statute Miles) | 7 |
| Air Temperature at event time (in degrees celsius) | 14 |
| Dew Point at event time (in degress fahrenheit) | 4 |
| Wind Direction (degrees magnetic) | 190 |
| Variable Wind Indicator | Unknown |
| Wind Speed (knots) | 4 |
| Wind Velocity Indicator | Unknown |
| Wind Gust Indicator | Unknown |
| Wind Gust (knots) | 0 |
| Altimeter Setting at event time (in. Hg) | 29 |
| Density Altitude (feet) | 1000 |
| Intensity of Precipitation | Unknown |
| METAR weather report | -- |
| Event Highest Injury | Minor |
| On Ground, Fatal Injuries | 0 |
| On Ground, Minor Injuries | 0 |
| On Ground, Serious Injuries | 0 |
| Injury Total Fatal | -- |
| Injury Total Minor | 8 |
| Injury Total None | 54 |
| Injury Total Serious | -- |
| Injury Total All | 8 |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 2444 |
| NTSB Notification Source | -- |
| NTSB Notification Date | Apr 14 1988 12:00AM |
| NTSB Notification Time | 1015 |
| Fiche Number and/or location -used to find docket information | 39449 |
| Date of most recent change to record | Dec 13 2000 11:40AM |
| User who most recently changed record | dbo |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | -- |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N110UR |
| NTSB Number | BFO88FA036 |
| Missing Aircraft Indicator | N |
| Federal Aviation Reg. Part | Part 121: Air Carrier |
| Type of Flight Plan filed | IFR |
| Flight plan Was Activated? | -- |
| Damage | Substantial |
| Aircraft Fire | None |
| Aircraft Explosion | None |
| Aircraft Manufacturer's Full Name | FOKKER |
| Aircraft Model | F28 MK 4000 |
| Aircraft Series Identifier | F28 MK 400 |
| Aircraft Serial Number | 11182 |
| Certified Max Gross Weight | 73000 |
| Aircraft Category | Airplane |
| Aircraft Registration Class | U.S. Registered/U.S. Soil |
| Aircraft is a homebuilt? | No |
| Flight Crew Seats | -- |
| Cabin Crew Seats | -- |
| Passenger Seats | -- |
| Total number of seats on the aircraft | 72 |
| Number of Engines | 2 |
| Fixed gear or retractable gear | Retractable |
| Aircraft, Type of Last Inspection | AAIP |
| Date of Last Inspection | -- |
| Airframe hours since last inspection | 129 |
| Airframe Hours | 14441 |
| ELT Installed | No |
| ELT Activated | Unknown |
| ELT Aided Location of Event Site | No |
| ELT Type | -- |
| Aircraft Owner Name | PIEDMONT AVIATION |
| Aircraft Owner Street Address | PO BOX 2720 |
| Aircraft Owner City | WINSTON-SALEM |
| Aircraft Owner State | NC |
| Aircraft Owner Country | |
| Aircraft Owner Zipcode | 27156 |
| Operator is an individual? | -- |
| Operator Name | |
| Operator Same as Owner? | Yes |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | Yes |
| Operator Street Address | |
| Operator City | |
| Operator State | |
| Operator Country | |
| Operator Zip code | |
| Operator Code | PAIA |
| Owner has at least one certificate | Yes - certificate holder |
| Other Operator of large aircraft? | No |
| Certified for Part 133 or 137 Operation | Unknown |
| Operator Certificate Number | -- |
| Indicates whether an air carrier operation was scheduled or not | Scheduled |
| Indicates Domestic or International Flight | Domestic |
| Operator carrying Pax/Cargo/Mail | Passenger Only |
| Type of Flying (Per_Bus / Primary) | Unknown |
| Second Pilot on Board | Yes |
| Departure Point Same as Event | No |
| Departure Airport Code | CLT |
| Departure City | CHARLOTTE |
| Departure State | NC |
| Departure Country | |
| Departure Time | 930 |
| Departure Time Zone | EDT |
| Destination Same as Local Flt | crash at destination city |
| Destination Airport Code | |
| Destination City | |
| Destination State | |
| Destination Country | |
| Specific Phase of Flight | Cruise |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | Jan 2 2001 10:30AM |
| User who most recently changed record | dbo |
| Since inspection or accident | -- |
| Event Location Runway Number and Location | 5 |
| Runway Length | 6302 |
| Runway Width | 150 |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |