Douglas DC-9-51 N401EA

Summary

On 21 January 1984 at about 15:05 local time, a Douglas DC-9-51 registered N401EA was involved in an incident near Tampa, Florida, United States. 33 people were on board and nobody was injured. The aircraft was slightly damaged. No probable cause statement is available for this record.

Date

21 January 1984 at 15:05

Classification

Incident

Location

Tampa, Florida, United States

Coordinates

Not recorded

Aircraft

Douglas DC-9-51

Registration

N401EA

Category

Airplane

Engines

2

Operator

Not recorded

Operating rule

Part 121: Air Carrier

Purpose of flight

Unknown

Phase of flight

Not recorded

Route

Tampa → Atlanta

Aircraft damage

Minor

Weather

VMC

Light

Day

NTSB number

MIA84IA064

Nobody was injured.

The NTSB has not published a probable cause for this record. No probable cause statement is present in the source data.

Nothing about the cause is stated here that is not in the source record.

Read the full NTSB narrative

WHILE CLIMBING AFTER TAKEOFF THRU ABOUT 3000 FT, THE CREW NOTED THAT THE #2 EPR HAD DROPPED ABOUT .08, FROM APRX 1.82 TO 1.74 EPR. SHORTLY AFTER THAT, THE 1ST OFFICER NOTED THAT THE AVM ON THE #2 ENG WAS AT THE MAX INDICATION. AT ABOUT 4000 FT, THERE WAS A LOUD EXPLOSIVE TYPE NOISE FROM THE REAR OF THE ACFT AS THE RIGHT ENG LOST POWER. THE CREW SECURED THE RIGHT ENG, RETURNED TO TAMPA & LANDED WITHOUT FURTHER INCIDENT. AN EXAM REVEALED THAT TURBINE BLADES HAD EXITED THE SIDE OF THE ENG TAILPIPE. TEARDOWN REVEALED THAT THE HIGH PRESSURE COMPRESSOR CENTER TUBE SEALING RING HAD AN APRX 1 IN (CIRCUMFERENTIAL) PIECE OF HARD SURFACE PLATING MISSING FROM THE OUTSIDE DIAMETER SEALING SURFACE. THIS FAILURE WAS IN AXIAL ALIGNMENT WITH A GAP IN THE REAR PISTON RING. NEITHER RING COMFORMED TO DESIGN SPECS. THERE WAS EVIDENCE THAT HOT AIR CAUSED COKING OF THE OIL. THE TURBINE SHAFT HAD FAILED APRX 13 INCHES FORWARD OF THE 4-1/2 BEARING. THE 4-1/2 BEARING SEALS WERE DAMAGED, 7 DISPLAYED COKE DEPOSITS. THE LOW PRESS TURBINE MOVED AFT INTERMESHING BLADES & STATORS.

Quoted verbatim from the NTSB record.