Was Headed to Detroit Yesterday Morning....

MauleMechanic · Post by **MauleMechanic** » Sun Aug 24, 2014 5:19 pm

.....when the little things ruin your day.

VIDEOS
https://www.youtube.com/watch?v=zFcK_4x ... e=youtu.be

https://www.youtube.com/watch?v=nXzsECX ... e=youtu.be

gbarrier · Post by **gbarrier** » Sun Aug 24, 2014 6:05 pm

Well that sucks. Any idea why?

MauleMechanic · Post by **MauleMechanic** » Sun Aug 24, 2014 6:56 pm

gbarrier wrote:Well that sucks. Any idea why?

Nope, it will await me Monday morning at 8am....or whenever!

Actually I have some ideas....but.....thats why I don't gamble.

FARMAULE · Post by **FARMAULE** » Sun Aug 24, 2014 6:57 pm

This happened to me as well ended up the wire rubbed through and was grounding out near the sensor. Scary moment for quite a while.

MauleMechanic · Post by **MauleMechanic** » Sun Aug 24, 2014 6:58 pm

FARMAULE wrote:This happened to me as well ended up the wire rubbed through and was grounding out near the sensor. Scary moment for quite a while.

Yeah, notice the cylinder head temp and oil pressure are fine...so far.

crbnunit · Post by **crbnunit** » Sun Aug 24, 2014 7:03 pm

Mine dropped the right mag during run up the other day. Ran great on the left mag so I Flew it over to the mechanic who never really found a cause but "fixed" the problem while troubleshooting. Said it was ready for pickup. Get there and find it is running rough on both mags, not making full power and cold on #1 cylinder. Turns out they cleaned the injectors in addition to working on the mags... Needless to say, I still don't have an airplane to fly!

Let us know the cause when you find it!

maules.com · Post by **maules.com** » Sun Aug 24, 2014 8:27 pm

The Oil temp does that when there is a shorted wire,(often back of cig lighter or one of the lighting rheostats). and or when PTT button is pressed or shorted as it spikes a millivoltage through the wireing loom.
The high amps in cruise indicate a short also.
Guessing, coz I wasnt there.

Seaplane Maule · Post by **Seaplane Maule** » Mon Aug 25, 2014 12:36 am

Had it happen a few years ago after a cowling replacement.....I dont remember if CHT climbed but Oil Temp was high....turned out the lower cowl was built a little weak at the outlet and would collapse at higher airspeeds (noticed some minor cracks in the paint) thereby limiting air flow out of cowling. A reinforcing strip screwed to the bottom of the lip solved the problem.

gbarrier · Post by **gbarrier** » Mon Aug 25, 2014 3:38 am

The real question is did it climb slowly or just hop over there but there's not a one of us that would have noticed. We all think we would but we all know better too.

captnkirk · Post by **captnkirk** » Mon Aug 25, 2014 6:54 am

yep it's hard to see those things over the newspaper while drinking that second cup of joe.

aero101 · Post by **aero101** » Mon Aug 25, 2014 9:50 am

Mine had same indication only would drop when instrument light rheostadt turned down... Found a bad ground at oil temp gauge....

Andy Young · Post by **Andy Young** » Mon Aug 25, 2014 2:32 pm

I often find bad ground when I'm landing. Bad ground! Bad!

MauleMechanic · Post by **MauleMechanic** » Mon Aug 25, 2014 2:36 pm

Some of the reply's are entertaining at best. I departed Spence at 6:45 am and began a climb to the north to 3,000ft. The oil temp increased in a normal manner the whole time BUT continued past the normal operating temp. I level-offed at 3,000ft and the temp continued to increase. All other gauges had normal readings indicating that the temp may be abnormal. I elected to make a precautionary landing back at Spence. As I turned back South I made a power descent to which the temp remained just touching the red mark. As I pushed it back into the hanger it "cooled" down indicating halfway in the green. All other gauges reading normal. Using a heat source the old probe indicated 240 deg while the new probe indicated midway or so of the green. A quick test flight will tell us the truth!

gbarrier · Post by **gbarrier** » Mon Aug 25, 2014 2:48 pm

Sounds like you're on it. Good job of monitoring on the climb out. Many if us get way too complacent.

Andy Young · Post by **Andy Young** » Mon Aug 25, 2014 2:48 pm

I once had a temp gauge go all the way to the top in a steep climb from takeoff. I had to clear a 12,000' ridge 20 miles from the airport (which was at 5,300'), so I was working it hard. Anyway, about five minutes into the climb, I looked over and saw ithe temp gauge pegged. I pulled the power back to idle and turned around to glide back down to the airport, and saw that the gauge had dropped to near the bottom Playing with the power showed that the temp indication increased immediately with RPM just as if it was a tach (or a pressure gauge; see where this is going)? On the ground, I pulled the temp sensor (bulb-type) out of the oil screen housing, and found that the bulb had broken off the capillary tube. This left the capillary tube open to oil pressure, which would make the temp gauge act as a pressure gauge. Turned out to be a relatively cheap fix, compared to what I feared it could have been at first.

Was Headed to Detroit Yesterday Morning....

Was Headed to Detroit Yesterday Morning....

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