CL65 crew did not advise the controller an automatic coupled approach was being conducted.

Attributes
ACN	571547
Time
Date	200301
Day	Sun
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : dal.airport
State Reference	TX
Altitude	agl single value : 550
Environment
Flight Conditions	IMC
Light	Night
Aircraft 1
Controlling Facilities	tower : dal.tower tower : tys.tower
Operator	common carrier : air carrier
Make Model Name	Regional Jet CL65, Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	ils localizer & glide slope : 13r
Flight Phase	descent : approach
Route In Use	approach : instrument precision
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tower : dal.tower
Operator	common carrier : air carrier
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	ground : taxi
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : instrument pilot : commercial
Experience	flight time last 90 days : 150 flight time total : 1800 flight time type : 500
ASRS Report	571547
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	inflight encounter : weather non adherence : company policies non adherence : far non adherence : published procedure other anomaly other
Independent Detector	other flight crewa other flight crewb
Resolutory Action	other
Consequence	faa : reviewed incident with flight crew
Supplementary
Problem Areas	Weather Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

Captain flying ILS runway 13R, autoplt coupled. WX 8 mi overcast, 10 mi visibility, light winds. At 550 ft AGL, I saw a B737 cross the approach end of the runway. No advisory from tower, other aircraft (B737) not on tower frequency. Our GS indication fell rapidly, autoplt pitched the aircraft down rapidly. 'GS, descent rate' aural warnings. Then a brief 'terrain, terrain.' captain immediately disconnected autoplt and visually established a GS and landed safely. Tower was notified of conflict on taxi in. Tower said that they had WX good enough to taxi an aircraft across the approach end. I didn't know they could do that when the ILS was the prevailing approach to the airport and an aircraft was on short final.

Original NASA ASRS Text

Title: CL65 CREW DID NOT ADVISE THE CTLR AN AUTO COUPLED APCH WAS BEING CONDUCTED.

Narrative: CAPT FLYING ILS RWY 13R, AUTOPLT COUPLED. WX 8 MI OVCST, 10 MI VISIBILITY, LIGHT WINDS. AT 550 FT AGL, I SAW A B737 CROSS THE APCH END OF THE RWY. NO ADVISORY FROM TWR, OTHER ACFT (B737) NOT ON TWR FREQ. OUR GS INDICATION FELL RAPIDLY, AUTOPLT PITCHED THE ACFT DOWN RAPIDLY. 'GS, DSCNT RATE' AURAL WARNINGS. THEN A BRIEF 'TERRAIN, TERRAIN.' CAPT IMMEDIATELY DISCONNECTED AUTOPLT AND VISUALLY ESTABLISHED A GS AND LANDED SAFELY. TWR WAS NOTIFIED OF CONFLICT ON TAXI IN. TWR SAID THAT THEY HAD WX GOOD ENOUGH TO TAXI AN ACFT ACROSS THE APCH END. I DIDN'T KNOW THEY COULD DO THAT WHEN THE ILS WAS THE PREVAILING APCH TO THE ARPT AND AN ACFT WAS ON SHORT FINAL.

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.