Learjet 35A N900JE

Summary

On 4 November 1987 at about 23:00 local time, a Learjet 35A registered N900JE, operated by Jack Eckerd Corp., was involved in an accident near Clearwater, Florida, United States. 3 people were on board and nobody was injured. The aircraft was substantially damaged. No probable cause statement is available for this record.

Date

4 November 1987 at 23:00

Classification

Accident

Location

Clearwater, Florida, United States

Nearest airport

St Petersburg/Clearwater (PIE)

Coordinates

Not recorded

Aircraft

Learjet 35A

Registration

N900JE

Category

Airplane

Engines

2

Operator

Jack Eckerd Corp.

Operating rule

Part 91: General Aviation

Purpose of flight

Executive/Corporate

Phase of flight

Not recorded

Route

W. Palm Bch → Unknown

Aircraft damage

Substantial

Weather

IMC

Light

Day

NTSB number

MIA88LA027

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

DURING TAXI UP TO HANGAR UNDER DIRECTION OF LINEMAN AFTER ARRIVAL THE FLT EXPERIENCED LOSS OF HYDRAULIC PRESSURE AND BRAKES. THE PLT COULD NOT ACTIVATE THE EMERGENCY BRAKES PRIOR TO ROLLING INTO THE HANGAR AND COLLIDING WITH TWO ACFT PRIOR TO COMING TO REST. EXAMINATION OF THE ACFT REVEALED THE SPOILERON CONTROL VALVE ASSEMBLY SUFFERED FRACTURE OF A NAS1351-4H-24P SCREW DUE TO HYDROGEN EMBRITTLEMENT CRACKING WHICH CAUSED THE SCREW HEAD TO SEPARATE FROM THE SCREW SHANK. THE SCREW IS ONE OF THREE WHICH RETAINS THE SELECTOR VALVE TO THE MANIFOLD ASSEMBLY. WHEN THE SCREW FAILED THE VALVE BODY SEPARATED ALLOWING LOSS OF ALL USABLE HYDRAULIC FLUID. THE SOURCE OF THE MIGRATING ELEMENTAL HYDROGEN INTO THE FRACTURE AREA COULD NOT BE DETERMINED. THE VALVE ASSEMBLY HAD BEEN INSTALLED IN THE ACFT SINCE MANUFACTURE IN 1977 AND HAD ACCUMULATED 5,642 HOURS. THE VALVE IS MAINTAINED ON CONDITION.

Quoted verbatim from the NTSB record.