A ce-750 flight crew; flying the localizer DME (back crs) to runway 12 initiated a missed approach w...

Attributes
ACN	1130967
Time
Date	201311
Place
Locale Reference	TUS.Tower
State Reference	AZ
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Make Model Name	Citation X (C750)
Operating Under FAR Part	Part 91
Flight Phase	Initial Approach
Flight Plan	IFR
Component
Aircraft Component	Tablet
Person 1
Function	Pilot Flying Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Person 2
Function	Captain Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Deviation - Altitude Overshoot Deviation - Procedural Published Material / Policy Inflight Event / Encounter CFTT / CFIT

Narrative:

Briefed the localizer back course 29R. There were rapid weather changing conditions. Originally weather was 3;800/5. We ended up flying to minimums. We briefed the correct minimums. Since I did not have the ipad in front of me I looked to the FMS for the next altitude to be set and asked that 2;990 be set. The non-flying pilot set 2;990 which is the altitude in the FMS database for the asone fix. MDA is 3;120. We had not gotten to 2;990 when tower gave us a low altitude alert and told us to check the altimeter setting. I immediately climbed approximately 150 ft and then called missed approach. We went missed and this time got vectors for the ILS. First of all there should be no altitude at asone fix or it should be changed to MDA. It is confusing and I feel a human factors issue. Secondly in the future I would look for and compare and brief that the altitude in the FMS is lower than the MDA altitude.

Original NASA ASRS Text

Title: A CE-750 flight crew; flying the LOC DME (BACK CRS) to Runway 12 initiated a missed approach when ATC advised of a low altitude alert. Reporters advised they had entered the FMS displayed altitude at ASONE of 2;990 MSL which was lower than the MDA(H) of 3;120 MSL.

Narrative: Briefed the LOC BC 29R. There were rapid weather changing conditions. Originally weather was 3;800/5. We ended up flying to minimums. We briefed the correct minimums. Since I did not have the iPad in front of me I looked to the FMS for the next altitude to be set and asked that 2;990 be set. The Non-Flying Pilot set 2;990 which is the altitude in the FMS Database for the ASONE fix. MDA is 3;120. We had not gotten to 2;990 when Tower gave us a Low Altitude Alert and told us to check the altimeter setting. I immediately climbed approximately 150 FT and then called Missed Approach. We went missed and this time got vectors for the ILS. First of all there should be no altitude at ASONE fix or it should be changed to MDA. It is confusing and I feel a human factors issue. Secondly in the future I would look for and compare and brief that the altitude in the FMS is lower than the MDA altitude.

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.

A ce-750 flight crew; flying the localizer DME (back crs) to runway 12 initiated a missed approach when ATC advised of a low altitude alert. Reporters advised they had entered the FMS displayed altitude at asone of 2;990 MSL which was lower than the MDA(H) of 3;120 MSL.