T-28 Pilot Report
| Flight: | 798 |
| Date: | 030516 |
| Flight Time: | 1.8 |
| Pilot: | Tom Warner |
| Controller: | Andy Detwiler |
| Location: | Norman, OK (KOUN) |
| Mission: | Research |
|
Computer Time |
Video Time |
Comments |
|
174142 |
Video start |
|
|
4741 |
Taxi |
|
|
5008 |
Time check: computer -1 sec from video, video matches atomic clock time |
|
|
5654 |
Takeoff |
|
|
5900 |
Instruments on |
|
|
5939 |
FM on |
|
|
180030 |
FM off |
|
|
0153 |
Reboot due to no telemetry data displayed at ops (file problem at ops) |
|
|
0353 |
Good reboot |
|
|
1446 |
High blower |
|
|
2340 |
010 / 19,000 MSL |
|
|
2436 |
In cloud / light to moderate turbulence |
|
|
2515 |
Left turn to 300 |
|
|
182557 |
Flash |
|
|
3035 |
Coming out of cloud |
|
|
3103 |
Left turn to 150 |
|
|
3200 |
150 |
|
|
3308 |
Out of cloud |
|
|
3437 |
Begin descent to 14,000 - 16,000 (low blower) |
|
|
3736 |
070 / 15,500 |
|
|
3800 |
In cloud, light to moderate turbulence |
|
|
3826 |
Flash |
|
|
3833 |
Heavy precip, some hail possibly heard on hail mic |
|
|
3842 |
Abrupt shear (possibly exited updraft) |
|
|
3910 |
Exit heavy precip |
|
|
3918 |
Close flash |
|
|
3942 |
Out of cloud / ¼ inch ice |
|
|
4043 |
120 / 15,000 |
|
|
4106 |
In cloud |
|
|
4220 |
Downdraft |
|
|
4251 |
Possible hail |
|
|
4235 |
125 |
|
|
4611 |
In cloud |
|
|
4800 |
2,500 foot per minute updraft |
|
|
4824 |
Out of cloud (strong storm at 12 o'clock) |
|
|
5312 |
In cloud |
|
|
5348 |
Strong updraft |
|
|
5424 |
Possible hail |
|
|
5434 |
Flash |
|
|
5502 |
Hail starts |
|
|
5510 |
Hail, strong updraft, severe turbulence |
|
|
5535 |
Video plexiglass cracked |
|
|
5820 |
Reverse course with left turn |
|
|
5940 |
Direct Norman with left turn to 245 |
|
|
190020 |
Strong updraft |
|
|
0034 |
Severe turbulence |
|
|
0037 |
Heavy precip, possible hail |
|
|
0135 |
Hail |
|
|
0212 |
Strong turbulent bump |
|
|
0345 |
Out of cloud |
|
|
0546 |
RPM fluctuating +/- 100 |
|
|
0735 |
RPM fluctuating +/- 100 |
|
|
1008 |
RPM surge |
|
|
1020 |
Surge cleared, preceded for a precautionary landing at Shawnee |
|
|
2211 |
Landing at Shawnee |
NOTES
Duane and Gary came out to Shawnee. We determined that ice ingestion into the carburetor caused the engine/RPM surge. Performed engine run and engine ran normally. Took off and circled above runway. Engine appeared normal, so preceded back to Norman. The flight to Norman was uneventful.
Weather
- Line of storms formed east of Norman on the east/northeast side of an upper level low and later became severe
- Storms went on to produce tornadoes after T-28 penetrated the most southern storm.
- 3 to 4 close lightning flashes
- Last storm penetrated was very strong.
o Encountered severe turbulence, strong updraft and heavy precipitation / hail
- Surprising little ice accumulation.
Maintenance
- Oil temperature climbed to approximately 100 C on climb out. Decreased 20 - 30 C while in cloud.
- Video outer plexiglass cover cracked by hail at 185535
- Padding on some of the safety wires near the cylinder heads was eroded from hail as well as the caulking around the hail sensor
- Top heater element of HVPS heavily eroded from precip/hail.
- New metal melted off of right elevator trailing edge from lightning strike
- RPM and engine surge apparently caused by ice/water ingestion into the carburetor
o Charlie S. recommends keeping carburetor heat on or applying carburetor heat if engine surging encountered
Operations
- Radio communications were occasionally scratchy and unreadable from ops
- Was able to proceed independently during periods when radio communications were not possible