Small aircraft aircraft on training flight lost primary radio communication with the tower.

Attributes
ACN	205568
Time
Date	199203
Day	Mon
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : apa
State Reference	CO
Altitude	msl bound lower : 7000 msl bound upper : 7000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tower : apa
Operator	general aviation : instructional
Make Model Name	Small Aircraft, High Wing, 1 Eng, Fixed Gear
Flight Phase	cruise other descent : approach descent other
Flight Plan	VFR
Person 1
Affiliation	Other
Function	instruction : instructor
Qualification	pilot : cfi pilot : commercial pilot : instrument
Experience	flight time last 90 days : 33 flight time total : 1521 flight time type : 157
ASRS Report	205568
Person 2
Affiliation	Other
Function	instruction : trainee
Qualification	pilot : student
Events
Anomaly	aircraft equipment problem : less severe other anomaly other
Independent Detector	other controllera other flight crewa
Resolutory Action	flight crew : overcame equipment problem
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

Landing at apa. Contacted den approach 34 DME north for TCA transit to apa. Cleared into the TCA at 7500, to remain VFR west of i- 25 (normal routing). Requested down to 7000 to maintain cloud clearance. Exiting the 7000 MSL area of the den TCA, southwest was advised 'clear of the TCA, squawk VFR, frequency change approved.' had called apa ATIS, called tower, no response. Changed radios, verified frequency, called tower, no response heard. Squawked 7700 for 1 min, then 7600, continued south, switched radio #1 to apa ground. Poor, but readable contact. Cleared to right traffic 17L, turned east to intercept, no further problems.

Original NASA ASRS Text

Title: SMA ACFT ON TRAINING FLT LOST PRIMARY RADIO COM WITH THE TWR.

Narrative: LNDG AT APA. CONTACTED DEN APCH 34 DME N FOR TCA TRANSIT TO APA. CLRED INTO THE TCA AT 7500, TO REMAIN VFR W OF I- 25 (NORMAL ROUTING). REQUESTED DOWN TO 7000 TO MAINTAIN CLOUD CLRNC. EXITING THE 7000 MSL AREA OF THE DEN TCA, SW WAS ADVISED 'CLR OF THE TCA, SQUAWK VFR, FREQ CHANGE APPROVED.' HAD CALLED APA ATIS, CALLED TWR, NO RESPONSE. CHANGED RADIOS, VERIFIED FREQ, CALLED TWR, NO RESPONSE HEARD. SQUAWKED 7700 FOR 1 MIN, THEN 7600, CONTINUED S, SWITCHED RADIO #1 TO APA GND. POOR, BUT READABLE CONTACT. CLRED TO R TFC 17L, TURNED E TO INTERCEPT, NO FURTHER PROBLEMS.

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.