<< >> NASA ASRS Report 632793, September 2004

A C12 and C550 departed on a VFR formation training flight, but encountered a brief IMC period. The formation flight was terminated and both aircraft returned IFR.

Attributes
ACN	632793
Time
Date	200409
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	msl single value : 2400
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : zzz.tracon tower : zzz.tower tower : cma.tower
Operator	Other
Make Model Name	Beechcraft Twin Turboprop Jet Undifferentiated or Other Model
Operating Under FAR Part	Part 91
Flight Phase	climbout : intermediate altitude
Flight Plan	VFR
Aircraft 2
Controlling Facilities	tracon : zzz.tracon tower : zzz.tower
Operator	Other
Make Model Name	Citation II S2/Bravo
Operating Under FAR Part	Part 91
Flight Phase	climbout : intermediate altitude
Flight Plan	VFR
Person 1
Affiliation	Other
Function	flight crew : captain oversight : pic
Qualification	pilot : multi engine pilot : instrument pilot : cfi pilot : atp
Experience	flight time last 90 days : 75 flight time total : 3500 flight time type : 400
ASRS Report	632793
Person 2
Affiliation	Other
Function	flight crew : first officer
Events
Anomaly	inflight encounter : vfr in imc non adherence : clearance non adherence : far
Independent Detector	other flight crewa other flight crewb
Resolutory Action	flight crew : exited adverse environment
Supplementary
Problem Areas	Flight Crew Human Performance Weather
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

After receiving ATIS and it stated that VFR conditions existed, the flight departed on a VFR formation training flight. The WX conditions were discussed between both air crews in both aircraft (C12 and C550). Neither set of crews saw any problems with the forecasted WX of 4000 ft scattered. The decision was made to depart to the west. Upon climb out, the lead aircraft inadvertently encountered unforecasted WX while in radar contact and talking to departure at approximately 2400 ft MSL. Since the crew was already talking to departure, they asked for an IFR clearance to ZZZ1. 15 seconds after the aircraft inadvertently entered the cloud, the aircraft was back in VFR conditions. The 2 aircraft were talking to each other on a company frequency and terminated the flight. They each got separate IFR clrncs back without further incident.

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Original NASA ASRS Text

Title: A C12 AND C550 DEPARTED ON A VFR FORMATION TRAINING FLT, BUT ENCOUNTERED A BRIEF IMC PERIOD. THE FORMATION FLT WAS TERMINATED AND BOTH ACFT RETURNED IFR.

Narrative: AFTER RECEIVING ATIS AND IT STATED THAT VFR CONDITIONS EXISTED, THE FLT DEPARTED ON A VFR FORMATION TRAINING FLT. THE WX CONDITIONS WERE DISCUSSED BTWN BOTH AIR CREWS IN BOTH ACFT (C12 AND C550). NEITHER SET OF CREWS SAW ANY PROBS WITH THE FORECASTED WX OF 4000 FT SCATTERED. THE DECISION WAS MADE TO DEPART TO THE W. UPON CLBOUT, THE LEAD ACFT INADVERTENTLY ENCOUNTERED UNFORECASTED WX WHILE IN RADAR CONTACT AND TALKING TO DEP AT APPROX 2400 FT MSL. SINCE THE CREW WAS ALREADY TALKING TO DEP, THEY ASKED FOR AN IFR CLRNC TO ZZZ1. 15 SECONDS AFTER THE ACFT INADVERTENTLY ENTERED THE CLOUD, THE ACFT WAS BACK IN VFR CONDITIONS. THE 2 ACFT WERE TALKING TO EACH OTHER ON A COMPANY FREQ AND TERMINATED THE FLT. THEY EACH GOT SEPARATE IFR CLRNCS BACK WITHOUT FURTHER INCIDENT.

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.