EMI on B-727 radio altitude and GPWS.

Attributes
ACN	283948
Time
Date	199409
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : ord
State Reference	IL
Altitude	msl bound lower : 13000 msl bound upper : 13000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zau
Operator	common carrier : air carrier
Make Model Name	B727 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : cfi pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 300 flight time total : 8000 flight time type : 2000
ASRS Report	283948
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : less severe non adherence : far non adherence : published procedure other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa other other : unspecified
Resolutory Action	flight crew : overcame equipment problem other
Consequence	Other
Supplementary
Air Traffic Incident	other

Narrative:

Climbing through 13000 ft MSL, radio altimeter indicated 900 ft. GPWS sounded 'too low terrain.' this warning continued for several mins. Had flight attendant check cabin for electronic devices. Passenger was found with cellular phone 'on' but not in use. Passenger shut off cellular phone and problem stopped. No further problems during rest of flight or return leg (ord-lga-ord).

Original NASA ASRS Text

Title: EMI ON B-727 RADIO ALT AND GPWS.

Narrative: CLBING THROUGH 13000 FT MSL, RADIO ALTIMETER INDICATED 900 FT. GPWS SOUNDED 'TOO LOW TERRAIN.' THIS WARNING CONTINUED FOR SEVERAL MINS. HAD FLT ATTENDANT CHK CABIN FOR ELECTRONIC DEVICES. PAX WAS FOUND WITH CELLULAR PHONE 'ON' BUT NOT IN USE. PAX SHUT OFF CELLULAR PHONE AND PROB STOPPED. NO FURTHER PROBS DURING REST OF FLT OR RETURN LEG (ORD-LGA-ORD).

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.