Pilot of an small transport has engine roughness and loss of oil. He diverts to nearby airport but has radio problems with carrier only and unreadable xmissions. He and ATC improvise to communication.

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Attributes
ACN	405784
Time
Date	199806
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : adm
State Reference	OK
Altitude	msl bound lower : 15500 msl bound upper : 15500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : adm tower : adm
Operator	general aviation : personal
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Flight Phase	cruise other descent other landing other
Flight Plan	VFR
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : atp
Experience	flight time last 90 days : 240 flight time total : 8600
ASRS Report	405784
Person 2
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : overcame equipment problem other
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

While cruising at 15500 ft, right engine developed roughness and started losing oil. Called ZFW, who was providing VFR flight following at the time, told them that we were diverting to adm airport and starting a VFR descent. When ZFW tried to hand me off to adm approach/tower, ZFW advised me that my reply was 'carrier only, no modulation,' and transmission was unreadable. I proceeded to adm and naved to the east side of airport while trying to lose altitude and establish communications with adm tower. Adm tower issued landing instructions and I replied by clicking my microphone twice as instructed by the tower if I could hear him. Landed at adm without incident, and talked to tower controller after securing aircraft. No conflicts with other traffic.

Original NASA ASRS Text

Title: PLT OF AN SMT HAS ENG ROUGHNESS AND LOSS OF OIL. HE DIVERTS TO NEARBY ARPT BUT HAS RADIO PROBS WITH CARRIER ONLY AND UNREADABLE XMISSIONS. HE AND ATC IMPROVISE TO COM.

Narrative: WHILE CRUISING AT 15500 FT, R ENG DEVELOPED ROUGHNESS AND STARTED LOSING OIL. CALLED ZFW, WHO WAS PROVIDING VFR FLT FOLLOWING AT THE TIME, TOLD THEM THAT WE WERE DIVERTING TO ADM ARPT AND STARTING A VFR DSCNT. WHEN ZFW TRIED TO HAND ME OFF TO ADM APCH/TWR, ZFW ADVISED ME THAT MY REPLY WAS 'CARRIER ONLY, NO MODULATION,' AND XMISSION WAS UNREADABLE. I PROCEEDED TO ADM AND NAVED TO THE E SIDE OF ARPT WHILE TRYING TO LOSE ALT AND ESTABLISH COMS WITH ADM TWR. ADM TWR ISSUED LNDG INSTRUCTIONS AND I REPLIED BY CLICKING MY MIKE TWICE AS INSTRUCTED BY THE TWR IF I COULD HEAR HIM. LANDED AT ADM WITHOUT INCIDENT, AND TALKED TO TWR CTLR AFTER SECURING ACFT. NO CONFLICTS WITH OTHER TFC.

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.