During vectors for an ILS approach, the tower advised the flight crew of a B737-200 that their aircraft triggered a low altitude alert. However, since they had been just switched to the opposite runway ILS approach due to the wind conditions, and cleared for the approach, they descended in accordance with the approach procedure. They subsequently broke out of the overcast and continued uneventfully.

Home

Browse by month

Random

Latest

About

Contact

Attributes
ACN	408661
Time
Date	199807
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : isp
State Reference	NY
Altitude	msl bound lower : 1500 msl bound upper : 1500
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : n90 tower : isp
Operator	common carrier : air carrier
Make Model Name	B737-200
Operating Under FAR Part	Part 121
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	other other : other pilot : atp pilot : commercial
Experience	flight time last 90 days : 240 flight time total : 2900 flight time type : 500
ASRS Report	408661
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 240 flight time total : 6500 flight time type : 1800
ASRS Report	408660
Events
Anomaly	other anomaly other other spatial deviation
Independent Detector	other controllera
Resolutory Action	none taken : anomaly accepted
Consequence	Other
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	other

Narrative:

While on approach to isp, runway 24 ILS (GS inoperative/localizer approach) established on arrival, configured and stabilized, 4 NM from OM (as published approach dictates I descended aircraft to 1500 ft MSL) approach control had us switch to macarthur tower frequency. On check in tower informed us he had an altitude alert and that he showed us at 1500 ft. No direction was given. We were established on the published approach on the proper altitude which is 1500 ft. At the OM we descended to the MDA, broke out and landed without incident.

Original NASA ASRS Text

Title: DURING VECTORS FOR AN ILS APCH, THE TWR ADVISED THE FLC OF A B737-200 THAT THEIR ACFT TRIGGERED A LOW ALT ALERT. HOWEVER, SINCE THEY HAD BEEN JUST SWITCHED TO THE OPPOSITE RWY ILS APCH DUE TO THE WIND CONDITIONS, AND CLRED FOR THE APCH, THEY DSNDED IN ACCORDANCE WITH THE APCH PROC. THEY SUBSEQUENTLY BROKE OUT OF THE OVCST AND CONTINUED UNEVENTFULLY.

Narrative: WHILE ON APCH TO ISP, RWY 24 ILS (GS INOP/LOC APCH) ESTABLISHED ON ARR, CONFIGURED AND STABILIZED, 4 NM FROM OM (AS PUBLISHED APCH DICTATES I DSNDED ACFT TO 1500 FT MSL) APCH CTL HAD US SWITCH TO MACARTHUR TWR FREQ. ON CHK IN TWR INFORMED US HE HAD AN ALT ALERT AND THAT HE SHOWED US AT 1500 FT. NO DIRECTION WAS GIVEN. WE WERE ESTABLISHED ON THE PUBLISHED APCH ON THE PROPER ALT WHICH IS 1500 FT. AT THE OM WE DSNDED TO THE MDA, BROKE OUT AND LANDED WITHOUT INCIDENT.

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.