Medium large transport flight crew reported receiving a low altitude alert from ATC on the approach ...

Attributes
ACN	1627166
Time
Date	201903
Local Time Of Day	1201-1800
Place
Locale Reference	CID.Airport
State Reference	IA
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Make Model Name	Medium Large Transport
Operating Under FAR Part	Part 121
Flight Phase	Initial Approach
Person 1
Function	Captain
Qualification	Flight Crew Multiengine Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument
Person 2
Function	First Officer
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine
Events
Anomaly	Deviation - Altitude Undershoot Deviation - Procedural Published Material / Policy Deviation - Procedural Clearance

Narrative:

Leveling at 2;700 MSL cleared for ILS runway 27 cid. ATC issued a low altitude alert and while our altimeter indicated that we were 300' above the cleared altitude; we executed an immediate go around and commenced a climb to the ATC issued altitude of 3;000 MSL. Upon level off; we realized that the altimeters had been incorrectly set during the descent check. We obtained the correct local altimeter setting from ATC and returned to the desired aircraft state. We returned for another ILS to runway 27 at cid and landed uneventfully. The probable cause was that the altimeter was set incorrectly do to confusion with an ATC received altimeter setting and failure to verify the correct setting. During the pre-descent ATIS check both crew members wrote the correct altimeter setting. During the descent we set the altimeter according to an ATC issued altimeter setting which we both believe we heard correctly.

Original NASA ASRS Text

Title: Medium Large transport flight crew reported receiving a low altitude alert from ATC on the approach to CID. They discovered they had the wrong altimeter setting entered.

Narrative: Leveling at 2;700 MSL cleared for ILS Runway 27 CID. ATC issued a low altitude alert and while our altimeter indicated that we were 300' above the cleared altitude; we executed an immediate go around and commenced a climb to the ATC issued altitude of 3;000 MSL. Upon level off; we realized that the altimeters had been incorrectly set during the descent check. We obtained the correct local altimeter setting from ATC and returned to the desired aircraft state. We returned for another ILS to Runway 27 at CID and landed uneventfully. The probable cause was that the altimeter was set incorrectly do to confusion with an ATC received altimeter setting and failure to verify the correct setting. During the pre-descent ATIS check both crew members wrote the correct altimeter setting. During the descent we set the altimeter according to an ATC issued altimeter setting which we both believe we heard correctly.

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.

Medium large transport flight crew reported receiving a low altitude alert from ATC on the approach to cid. They discovered they had the wrong altimeter setting entered.