In cavu daylight conditions the flight crew of a B767-300 encountered multiple map shifts and errone...

Narrative:

We were at 7;000 MSL on the arrival to runway 05 at lsgg. The weather was VFR; clear skies and unlimited visibility. The aircraft started map shifting as we were attempting to fly direct to lusar. We got several IRS navigation only and verify position FMC messages. At about the same time; ATC gave us vectors for the approach. The airport and runway were visible as well as the hills beneath the aircraft. As the pilot not flying; I switched over to raw data to monitor the ILS. ATC gave us descent to 4;000 with a turn to intercept the localizer. We were cleared for the approach when established.the approach continued normally until approximately 400 AGL when the egpws started giving 'caution terrain; too low terrain; pull up; pull up' warnings. We verified we were on glide slope; localizer and PAPI with no terrain in front or beneath us. The gear and flaps were verified in landing configuration. We continued the approach to landing. The egpws pull up warning did not cease until the aircraft had slowed to about 40 KTS. We entered a log item in ACARS and gave a verbal report to lsgg station maintenance. The mechanics acknowledged that this event has happened before.

Original NASA ASRS Text

Title: In CAVU daylight conditions the flight crew of a B767-300 encountered multiple map shifts and erroneous EGPWS terrain warnings while on approach to LSGG. The approach and landing were conducted normally despite continued warnings from the malfunctioning systems.

Narrative: We were at 7;000 MSL on the arrival to Runway 05 at LSGG. The weather was VFR; clear skies and unlimited visibility. The aircraft started map shifting as we were attempting to fly direct to LUSAR. We got several IRS NAV ONLY and VERIFY POSITION FMC messages. At about the same time; ATC gave us vectors for the approach. The airport and runway were visible as well as the hills beneath the aircraft. As the pilot not flying; I switched over to raw data to monitor the ILS. ATC gave us descent to 4;000 with a turn to intercept the localizer. We were cleared for the approach when established.The approach continued normally until approximately 400 AGL when the EGPWS started giving 'Caution Terrain; Too Low Terrain; Pull Up; Pull Up' warnings. We verified we were on glide slope; localizer and PAPI with no terrain in front or beneath us. The gear and flaps were verified in landing configuration. We continued the approach to landing. The EGPWS Pull Up warning did not cease until the aircraft had slowed to about 40 KTS. We entered a log item in ACARS and gave a verbal report to LSGG Station Maintenance. The mechanics acknowledged that this event has happened before.

Data retrieved from NASA's ASRS site as of July 2013 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.

Attributes
ACN	1013551
Time
Date	201205
Local Time Of Day	0001-0600
Place
Locale Reference	LSGG.Airport
State Reference	FO
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	B767-300 and 300 ER
Operating Under FAR Part	Part 121
Flight Phase	Descent
Flight Plan	IFR
Component
Aircraft Component	INS / IRS / IRU
Person 1
Function	Captain Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 300 Flight Crew Total 18000 Flight Crew Type 8000
Person 2
Function	Pilot Flying First Officer
Events
Anomaly	Aircraft Equipment Problem Less Severe

In cavu daylight conditions the flight crew of a B767-300 encountered multiple map shifts and erroneous egpws terrain warnings while on approach to lsgg. The approach and landing were conducted normally despite continued warnings from the malfunctioning systems.