Aircraft landed without ATC landing clearance.

Attributes
ACN	113158
Time
Date	198906
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : atl
State Reference	GA
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	landing other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 220 flight time total : 11000 flight time type : 870
ASRS Report	113158
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	incursion : runway non adherence : clearance non adherence : far
Independent Detector	other controllera other flight crewa
Resolutory Action	controller : issued new clearance none taken : detected after the fact
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Company has instituted new checklist procedures where captain and copilot answer checklist for critical items (ie, landing gear, flaps). Also pilot not flying lowers gear and flaps for pilot flying. We were instructed to contact tower at marker on ILS approach. As we went by marker, the frequency change was initiated but not completed due to gear being lowered, flaps being lowered to 25, then 30, and checklist called for with both pilots answering. Upon turning off runway, discovered wrong frequency. Upon setting right frequency, 119.5, tower advised us to cross runway 8L and that we had been 'cleared to land'. Forget exact ceiling but when we were answering checklist for critical items, it was at a critical time. We did not break out until by marker.

Original NASA ASRS Text

Title: ACFT LANDED WITHOUT ATC LNDG CLRNC.

Narrative: COMPANY HAS INSTITUTED NEW CHECKLIST PROCS WHERE CAPT AND COPLT ANSWER CHECKLIST FOR CRITICAL ITEMS (IE, LNDG GEAR, FLAPS). ALSO PLT NOT FLYING LOWERS GEAR AND FLAPS FOR PLT FLYING. WE WERE INSTRUCTED TO CONTACT TWR AT MARKER ON ILS APCH. AS WE WENT BY MARKER, THE FREQ CHANGE WAS INITIATED BUT NOT COMPLETED DUE TO GEAR BEING LOWERED, FLAPS BEING LOWERED TO 25, THEN 30, AND CHECKLIST CALLED FOR WITH BOTH PLTS ANSWERING. UPON TURNING OFF RWY, DISCOVERED WRONG FREQ. UPON SETTING RIGHT FREQ, 119.5, TWR ADVISED US TO CROSS RWY 8L AND THAT WE HAD BEEN 'CLRED TO LAND'. FORGET EXACT CEILING BUT WHEN WE WERE ANSWERING CHECKLIST FOR CRITICAL ITEMS, IT WAS AT A CRITICAL TIME. WE DID NOT BREAK OUT UNTIL BY MARKER.

Data retrieved from NASA's ASRS site as of August 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.