<< >> NASA ASRS Report 1238010, January 2015

LR60 first officer reports being cleared to 2;400 feet by approach control but realizes during the descent by looking at the terrain on the ILS approach chart that the controller must have said 3;400 feet. A low altitude alert is issued by ATC as the reporter is starting to climb.

Attributes
ACN	1238010
Time
Date	201501
Local Time Of Day	0601-1200
Place
Locale Reference	P80.TRACON
State Reference	OR
Environment
Flight Conditions	Mixed
Aircraft 1
Make Model Name	Learjet 60
Operating Under FAR Part	Part 91
Flight Phase	Initial Approach
Route In Use	Vectors
Flight Plan	IFR
Person 1
Function	First Officer Pilot Flying
Qualification	Flight Crew Multiengine Flight Crew Air Transport Pilot (ATP) Flight Crew Flight Instructor Flight Crew Instrument
Experience	Flight Crew Last 90 Days 130 Flight Crew Total 2800 Flight Crew Type 300
Events
Anomaly	Deviation - Altitude Excursion From Assigned Altitude Deviation - Procedural Clearance Inflight Event / Encounter CFTT / CFIT

Narrative:

While on vectors to final for the ILS 13 to hio approach cleared for a decent to 2;400 ft. We started down and at about 2;900 ft. We realized that th DME arc only three miles to our north; was only alowing 3;700 ft. At that time I initiated a climb and simultaneously the controller issued a low altitude alert and told us to climb and maintain 3;400 ft.

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Original NASA ASRS Text

Title: LR60 First Officer reports being cleared to 2;400 feet by Approach Control but realizes during the descent by looking at the terrain on the ILS approach chart that the Controller must have said 3;400 feet. A low altitude alert is issued by ATC as the reporter is starting to climb.

Narrative: While on vectors to final for the ILS 13 to HIO approach cleared for a decent to 2;400 Ft. we started down and at about 2;900 Ft. we realized that th DME arc only three miles to our north; was only alowing 3;700 Ft. At that time I initiated a climb and simultaneously the controller issued a low altitude alert and told us to climb and maintain 3;400 Ft.

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.