Service difficulty report · Pressure Sensor · Boeing 777224

Difficulty date
July 15, 2022
Submitted
July 15, 2022
Operation
Air carrier
Aircraft
N27015
Make and model
Boeing 777224
Aircraft serial
28678
Aircraft time
103,155 hours, 10,501 cycles
Part
Pressure Sensor
Part number
21188902
Part serial
108A0316
Condition
Failed
Location
Cabin
Stage of operation
CR
How discovered
O
Nature of condition
O
Precautionary procedure
A

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

What was found

CABIN ALTITUDE EICAS WARNING CABIN ALTITUDE IS GREATER THAN OR EQUAL TO 10K FEET AND THE SELE CTED LANDING ALTITUDE IS LESS THAN OR EQUAL TO 9.65K FEET OR CAB IN ALTITUDE IS GREATER THAN OR EQUAL TO 14.2K FEET AND THE SELEC TED LANDING ALTITUDE IS GREATER THAN 9.65K FEET OR IF CPCS REMOT E SENSOR IS FAILED AND LOSS OF BOTH L AND R PARTS ADDED. REPLACED REMOTE PRESSURE SENSOR PRECAUTIONARY REF REPLACED LEFT AND RIGHT ASCPC PRECAUTIOARY REF SOFTWARE UPDATE 3677-GRS-015-00 CONFIRMED INSTALLED IN LEFT AND ROTABLE PARTS CHANGE WAS INDICATED - TT # 1147994 SN OFF 0316 AMM21-31-07-400-801. AMM36-11-20-400-801 RIGHT CONTROLLERS ROTABLE PARTS CHANGE WAS INDICATED - TT # 1839308 SN OFF 0569 TT # 1836709 SN OFF 0963 SENSOR, PRESSUR OFF 25-2131-9-0002 0316 ON 25-2131-9-0002 1645 CONTROLLER, CAB OFF 25-3611-9-0009 0569 ON 25-3611-9-0009 0700 CONTROLLER, CAB OFF 25-3611-9-0009 0963 ON 25-3611-9-0009 0326 PERFORMED EXTENSIVE DVI OF ALL DOORS SEALS AND FUSELAGE, ACCOMPLISHED SEE LOG PAGES 9041309, 9041251, 9041237, 9041229 ACCOMPLISHED DETAILED INSPECTION OF FWD AND AFT OUTFLOW VALVES ORDLM MARTINEZ WITH NO DEFECTS NOTED. ACCOMPLISHED HULL DECAY CHECK REF AMM05-51-24-720-801 ALL WITHIN LIMITS. FOR ALL ADDITIONAL WORK ADD EMP:U104896,U112755