An air carrier flight crew reported a GPS anomaly during arrival and departure at manila airport (rp...

Attributes
ACN	1375241
Time
Date	201607
Local Time Of Day	1801-2400
Place
Locale Reference	RPHI.ARTCC
State Reference	FO
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	Boeing Company Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Initial Approach
Flight Plan	IFR
Component
Aircraft Component	GPS & Other Satellite Navigation
Person 1
Function	Pilot Not Flying Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Type 1111
Events
Anomaly	Aircraft Equipment Problem Less Severe Inflight Event / Encounter Other / Unknown

Narrative:

On arrival into rpll; we experienced a dual GPS failure. Both GPS indicated invalid on the CDU. This occurred on final approach to runway 24 around 20 miles from landing. We were able to continue and land visually uneventfully and the AC discrepancy was added to the logbook. We were informed by the local station maintenance that this is a known issue that has happened repeatedly and is being investigated. Both GPS systems were confirmed normal operation and the discrepancy was cleared on the ground before departure. On departure on runway 06; once again both GPS signals were lost soon after departure. At 30 miles to the east of rpll while proceeding toward jom VOR; both GPS systems were operating normally. They both seemed to come back to normal reception simultaneously. There were no further anomalies during the remainder of the flight.

Original NASA ASRS Text

Title: An air carrier flight crew reported a GPS anomaly during arrival and departure at Manila Airport (RPLL). The anomaly was transient and not thought to be aircraft related. Manila station personnel indicated that this was a known issue and was being investigated.

Narrative: On arrival into RPLL; we experienced a dual GPS failure. Both GPS indicated invalid on the CDU. This occurred on final approach to runway 24 around 20 miles from landing. We were able to continue and land visually uneventfully and the AC discrepancy was added to the logbook. We were informed by the local station maintenance that this is a known issue that has happened repeatedly and is being investigated. Both GPS systems were confirmed normal operation and the discrepancy was cleared on the ground before departure. On departure on Runway 06; once again both GPS signals were lost soon after departure. At 30 miles to the east of RPLL while proceeding toward JOM VOR; both GPS systems were operating normally. They both seemed to come back to normal reception simultaneously. There were no further anomalies during the remainder of the flight.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.

An air carrier flight crew reported a GPS anomaly during arrival and departure at manila airport (rpll). The anomaly was transient and not thought to be aircraft related. Manila station personnel indicated that this was a known issue and was being investigated.