<< >> NASA ASRS Report 974106, October 2011

Cys tower issued a low altitude alert to a pilot on a runway 27 ILS after the pilot misunderstood his final intercept altitude assignment.

Attributes
ACN	974106
Time
Date	201110
Local Time Of Day	0601-1200
Place
Locale Reference	CYS.Airport
State Reference	WY
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Make Model Name	Small Transport Low Wing 2 Turboprop Eng
Operating Under FAR Part	Part 91
Flight Phase	Final Approach
Flight Plan	IFR
Component
Aircraft Component	Altitude Alert
Person 1
Function	Single Pilot Pilot Flying
Qualification	Flight Crew Multiengine Flight Crew Commercial Flight Crew Flight Instructor Flight Crew Instrument
Experience	Flight Crew Last 90 Days 21 Flight Crew Total 2129 Flight Crew Type 1236
Events
Anomaly	ATC Issue All Types Inflight Event / Encounter CFTT / CFIT

Narrative:

Cheyenne approach assigned an intercept heading and intercept altitude for the runway 27 ILS. I read back the intercept altitude as 7;000. On the approach cys tower issued a low altitude alert. Not sure if the cheyenne controller assigned the incorrect altitude or I misunderstood the altitude assignment. I think I read it back as 7;000; basically a miscommunication on the altitude assignment. As the pilot I should have noticed that the altitude of 7;000 MSL was too low for the intercept. Fortunately it was VMC at the time of the deviation.

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Original NASA ASRS Text

Title: CYS Tower issued a Low Altitude Alert to a pilot on a Runway 27 ILS after the pilot misunderstood his final intercept altitude assignment.

Narrative: Cheyenne Approach assigned an intercept heading and intercept altitude for the Runway 27 ILS. I read back the intercept altitude as 7;000. On the approach CYS Tower issued a low altitude alert. Not sure if the Cheyenne Controller assigned the incorrect altitude or I misunderstood the altitude assignment. I think I read it back as 7;000; basically a miscommunication on the altitude assignment. As the pilot I should have noticed that the altitude of 7;000 MSL was too low for the intercept. Fortunately it was VMC at the time of the deviation.

Data retrieved from NASA's ASRS site as of April 2012 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.