B767-300 crew had faulty GS indications at atl runway 27L.

Attributes
ACN	504303
Time
Date	200103
Day	Wed
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : atl.airport
State Reference	GA
Altitude	msl single value : 2800
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : atl.tracon
Operator	common carrier : air carrier
Make Model Name	B767-300 and 300 ER
Operating Under FAR Part	Part 121
Navigation In Use	ils localizer & glide slope : 27l other other
Flight Phase	descent : approach
Route In Use	approach : visual
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 400 flight time total : 20500 flight time type : 8000
ASRS Report	504303
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : commercial pilot : instrument
Events
Anomaly	cabin event : passenger misconduct cabin event : passenger electronic device
Independent Detector	other flight crewa other flight crewb
Resolutory Action	aircraft : equipment problem dissipated
Supplementary
Problem Areas	Passenger Human Performance Aircraft
Primary Problem	Aircraft

Narrative:

We were cleared to descend to 2800 ft and for an ILS approach while approximately 8 mi from the LOM. GS crossing altitude is 2795 ft. The ILS identify had been verified on the approach checklist. After reporting the airport in sight, we were reclred for a visual approach. As we intercepted the localizer at 2800 ft approximately 4 mi from the LOM, we noticed both HSI's and the standby ILS indicating 'fly down' and the aircraft began to descend. The first officer (PF) immediately disconnected the autoplt and leveled the aircraft. As we doublechked ILS tuning and raw data the GS moved from 'fly down' to 'fly up.' I called the purser and instructed him/her to walk through quickly and look for passenger using ped's. After GS capture, all operations were normal. After arrival at the gate, the purser told me that 2 passenger were found with cell phones on. Purser failed to note the seat numbers and the passenger deplaned without being idented.

Original NASA ASRS Text

Title: B767-300 CREW HAD FAULTY GS INDICATIONS AT ATL RWY 27L.

Narrative: WE WERE CLRED TO DSND TO 2800 FT AND FOR AN ILS APCH WHILE APPROX 8 MI FROM THE LOM. GS XING ALT IS 2795 FT. THE ILS IDENT HAD BEEN VERIFIED ON THE APCH CHKLIST. AFTER RPTING THE ARPT IN SIGHT, WE WERE RECLRED FOR A VISUAL APCH. AS WE INTERCEPTED THE LOC AT 2800 FT APPROX 4 MI FROM THE LOM, WE NOTICED BOTH HSI'S AND THE STANDBY ILS INDICATING 'FLY DOWN' AND THE ACFT BEGAN TO DSND. THE FO (PF) IMMEDIATELY DISCONNECTED THE AUTOPLT AND LEVELED THE ACFT. AS WE DOUBLECHKED ILS TUNING AND RAW DATA THE GS MOVED FROM 'FLY DOWN' TO 'FLY UP.' I CALLED THE PURSER AND INSTRUCTED HIM/HER TO WALK THROUGH QUICKLY AND LOOK FOR PAX USING PED'S. AFTER GS CAPTURE, ALL OPS WERE NORMAL. AFTER ARR AT THE GATE, THE PURSER TOLD ME THAT 2 PAX WERE FOUND WITH CELL PHONES ON. PURSER FAILED TO NOTE THE SEAT NUMBERS AND THE PAX DEPLANED WITHOUT BEING IDENTED.

Data retrieved from NASA's ASRS site as of July 2007 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.