Medium large transport flight crew uses wrong frequency, lands without tower contact.

Attributes
ACN	250469
Time
Date	199308
Day	Tue
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : bdl
State Reference	CT
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	landing other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 7000 flight time type : 3000
ASRS Report	250469
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	incursion : landing without clearance non adherence : far non adherence : clearance other anomaly other
Independent Detector	other flight crewa
Resolutory Action	other
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Cleared for ILS approach to runway 24 at bdl and told by approach controller to contact tower. At that time, I (first officer) was also extending flaps as captain called for them. I checked approach plate for tower frequency, misread 120.3 for 120.8. Placed 120.8 in radio and reported final for runway 24. Thought I received landing clearance. We continued approach and checklists. On short final, 1/2 mi, descending 500 ft, I again called tower to verify landing clearance. Other aircraft were talking on frequency, thought tower was busy. We landed on runway 24. On rollout, captain told me tower frequency was 120.3 vice 120.8. We switched radio to proper frequency. Tower told us to turn off runway and contact ground. My assumptions of incident/lessons learned: 1) I was a little tired. Long day, keep guard up, read carefully. 2) late at night. When I made call on wrong frequency, I heard other aircraft talking, I assumed tower was not fully staffed. Perhaps tower controller was talking on ground or clearance. 3) about the time you feel like you have a good handle on this profession, you're served a heaping slice of humble pie.

Original NASA ASRS Text

Title: MLG FLC USES WRONG FREQ, LANDS WITHOUT TWR CONTACT.

Narrative: CLRED FOR ILS APCH TO RWY 24 AT BDL AND TOLD BY APCH CTLR TO CONTACT TWR. AT THAT TIME, I (FO) WAS ALSO EXTENDING FLAPS AS CAPT CALLED FOR THEM. I CHKED APCH PLATE FOR TWR FREQ, MISREAD 120.3 FOR 120.8. PLACED 120.8 IN RADIO AND RPTED FINAL FOR RWY 24. THOUGHT I RECEIVED LNDG CLRNC. WE CONTINUED APCH AND CHKLISTS. ON SHORT FINAL, 1/2 MI, DSNDING 500 FT, I AGAIN CALLED TWR TO VERIFY LNDG CLRNC. OTHER ACFT WERE TALKING ON FREQ, THOUGHT TWR WAS BUSY. WE LANDED ON RWY 24. ON ROLLOUT, CAPT TOLD ME TWR FREQ WAS 120.3 VICE 120.8. WE SWITCHED RADIO TO PROPER FREQ. TWR TOLD US TO TURN OFF RWY AND CONTACT GND. MY ASSUMPTIONS OF INCIDENT/LESSONS LEARNED: 1) I WAS A LITTLE TIRED. LONG DAY, KEEP GUARD UP, READ CAREFULLY. 2) LATE AT NIGHT. WHEN I MADE CALL ON WRONG FREQ, I HEARD OTHER ACFT TALKING, I ASSUMED TWR WAS NOT FULLY STAFFED. PERHAPS TWR CTLR WAS TALKING ON GND OR CLRNC. 3) ABOUT THE TIME YOU FEEL LIKE YOU HAVE A GOOD HANDLE ON THIS PROFESSION, YOU'RE SERVED A HEAPING SLICE OF HUMBLE PIE.

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.