Commuter lands without clearance.

Attributes
ACN	191692
Time
Date	199110
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : anc
State Reference	AK
Altitude	agl bound lower : 0 agl bound upper : 1600
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : anc tower : anc
Operator	common carrier : air carrier
Make Model Name	Small Transport
Flight Phase	descent : approach landing other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : cfi
Experience	flight time last 90 days : 250 flight time total : 3900 flight time type : 1000
ASRS Report	191692
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	incursion : landing without clearance non adherence : far
Independent Detector	other controllera other flight crewa
Resolutory Action	none taken : detected after the fact
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

We landed without clearance after an ILS approach. WX xoz overcast 1 south. Approach control was working several aircraft. We were clear for the approach but not instructed to contact tower. Upon landing, we indicated our intention to rollout to a specific intersection and were informed we were still on approach frequency. When we switched to tower, and then ground not a word was said about what happened. Part of the problem is 'the rotation' of controllers in all positions so that we (pilots) are conditioned to hearing an individual either on radar or, ground, or tower etc. Because of the WX conditions at the time, we were concentrating on the approach and did not notice the ATC failure. When the workload is high, failure of 1 individual to do his job is more likely to be overlooked by the other people involved. Usually when someone does not change frequency, ATC calls repeatedly for that aircraft to switch. When the WX is low, we all need to be more cautious.

Original NASA ASRS Text

Title: COMMUTER LANDS WITHOUT CLRNC.

Narrative: WE LANDED WITHOUT CLRNC AFTER AN ILS APCH. WX XOZ OVCST 1 S. APCH CTL WAS WORKING SEVERAL ACFT. WE WERE CLR FOR THE APCH BUT NOT INSTRUCTED TO CONTACT TWR. UPON LNDG, WE INDICATED OUR INTENTION TO ROLLOUT TO A SPECIFIC INTXN AND WERE INFORMED WE WERE STILL ON APCH FREQ. WHEN WE SWITCHED TO TWR, AND THEN GND NOT A WORD WAS SAID ABOUT WHAT HAPPENED. PART OF THE PROBLEM IS 'THE ROTATION' OF CTLRS IN ALL POSITIONS SO THAT WE (PLTS) ARE CONDITIONED TO HEARING AN INDIVIDUAL EITHER ON RADAR OR, GND, OR TWR ETC. BECAUSE OF THE WX CONDITIONS AT THE TIME, WE WERE CONCENTRATING ON THE APCH AND DID NOT NOTICE THE ATC FAILURE. WHEN THE WORKLOAD IS HIGH, FAILURE OF 1 INDIVIDUAL TO DO HIS JOB IS MORE LIKELY TO BE OVERLOOKED BY THE OTHER PEOPLE INVOLVED. USUALLY WHEN SOMEONE DOES NOT CHANGE FREQ, ATC CALLS REPEATEDLY FOR THAT ACFT TO SWITCH. WHEN THE WX IS LOW, WE ALL NEED TO BE MORE CAUTIOUS.

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.