Service difficulty report · Fitting · Lear 55LEAR

Difficulty date
March 25, 2018
Submitted
March 30, 2018
Operation
Air carrier
Aircraft
N928AL
Make and model
Lear 55LEAR
Aircraft serial
041
Aircraft time
8,976 hours, 7,406 cycles
Part
Fitting
Part number
AN8156D
Condition
Chafed
Location
Hyd Line
Part time
8,976 hours, 7,406 cycles
Stage of operation
AP
How discovered
O
Nature of condition
K, J
Precautionary procedure
O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

ON SHORT FINAL, CREW NOTICED HYDRAULIC LOW PRESSURE LIGHT ILLUMINATED, THE HYDRAULIC PRESSURE WAS STILL IN THE LOWER PORTION OF THE GREEN. ANALYZED EMERGENCY PROCEDURES CHECKLIST, AND PROCEEDED TO LOWER THE LANDING GEAR. LT AND RT MLG LEGS EXTENDED AND SHOWED GREEN LIGHTS, THE NLG HAD NOT UNLOCKED. NOTED THAT THE HYDRAULIC PRESSURE WAS NOW A ZERO. EXTENDED THE LANDING GEAR WITH THE EMERGENCY EXTENSION SWITCH, THE NLG EXTENDED, WITH 3 GREEN LIGHTS. DID NOT DECLARE AN EMERGENCY. ON LANDING, UTILIZED EMERGENCY BRAKING. NOTED A POOPED RT OUTBOARD MLG TIRE AFTER EXITING THE AIRCRAFT. NOTED THAT THERE WAS A LARGE AMOUNT OF HYDRAULIC FLUID LEAKING FROM THE DRAINS ON THE AIRCRAFT BELLY. AFTER INSPECTION, A CHAFED AND LEAKING FITTING ON THE RT BRAKE HYDRAULIC RETURN LINE WAS FOUND.