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Vacation and gear issues

gmascelli

Active member
Supporting Member
Ocean City, MD
Aircraft Year
1976
Aircraft Type
112/A
Reg Number
N453TC
Serial Number
453

We are headed back to Vero Beach. Vero has become or favorite go to place over the last few years. We have searched for a condo for two of those visits but with Ziva nobody would take a large dog.
This year we renew the hunt but we are also considering apartments. Mary and I have worked all the numbers and the easiest way to avoid an initial purchase cost with a possible land lease or HOA fees is to just rent an apartment. We even ran numbers to compare renting a pet friendly place for two or three months to the tune of 6-9k a month. For an additional 4k we would have our own place available all year round. As bad as my body feels when it gets cold I would be happy to head south in October and not come back until April.


The Weather Watch
Some of my go to weather pages have changed or gone away but I have been working on some new to me weather tools for my cross country flight planning. I always use Foreflights Imagery and MOS on the weather selection along with Windy, Aviation Weather Center, Weather Underground.



Sunday 3.10 Pre-Flight
It's the day before departure and I am going to complete my preflight and fuel sump. Total fuel on board for our flight south is 55 gallons. 3 Tango Charlie is ready to go and I'll turn on the preheats overnight for our planned departure of 8am.



Monday 3.11 Departure Day
Rise and shine we're on vacation! Well, almost. Bags were packed yesterday and the SUV is ready to go. Mary and I will make a breakfast stop at the local eatery, Abi's Diner. We have a few snacks and water packed for the flight.
Todays routing will be Ocean City (KOXB) to Mt. Pleasant SC (KLRO)for a fuel and go.

We departed Ocean City in very strong gusty winds and point for Snowhill VOR. As we reached the mid peninsula we were rocked by strong wind gusts between 40 and 49 knots at six thousand five hundred. I believe the gust actually pulled the gear door open which triggered a gear warning light. I slowed my airspeed below 130 and attempted to drop the gear, no luck. On to the check list and remember to fly the plane. I tried shaking the gear down and still no luck with multiple cycles. I canceled flight following with Potomac approach and diverted to Accomack.


I needed to loose altitude so I circled around and worked my way down to a safe altitude and activated the auto pilot for heading and altitude to perform the emergency gear dump. I heard and felt all three gear drop with the nose gear needing a bit of a shake. Finally three green confirmed.

I contacted Accomack (KMFV) operations to ask for a gear check as I made a low pass with a visual confirmation. The gear was down, now I hope it indeed was locked. Mary and I talked about what if situations when she asked if the gear isn’t locked then what. Awkward pause, then we’re done flying because it will belly in. I felt her anxiety with just her look. My bride said, trying to ease tension, I’m done flying if that happens, me too.

It seemed like a long flight back to OCMD. I tried multiple times to have OC Ops give me one more confirmation but nobody answered. Did I mention the gusty winds? It was a serious ride em’ cowboy landing. I held off and somehow gently rolled the mains on followed by a nice wheelie, gently letting the nose gear touch. We were still rolling on three good gear.
I tucked 3 Tango Charlie in the hangar and we decided to drive to Vero Beach FL. I haven’t made this drive in forty years, but I was up for the challenge. After switching vehicles from my 2003 MB ML 320 to our 2017 MB GLC300 we were on our way, it was 10:30.

Two fuel stops with one fast food stop coupled with the second gas and go we were back at it. Fifteen hours later we arrived at our hotel, on the beach, in Vero at 2am.
 
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My A&P just did a gear swing after my gear problem last month. Mine is the first Commander for thier shop and he was "impressed" with the authority that the springs pulled the gear down when they hit the e-dump.

Glad it worked out OK!
 
Chris, how old are your springs?
Originals, or have you purchased new ones from Welch Machine for peace of mind?
I decided that 50 year old springs should be retired…
If I remember correctly the nose gear springs were easily replaced but the mains were a two person job to get the new ones installed.
 
Sorry to hijack your thread Gary.
And sorry to hear about the dilemma! Hope you can relax and enjoy Vero Beach. I know gear issues are quite troublesome. Hopefully yours will be something minor.
We had a couple of micro switches giving us heart palpitations awhile back. A few AMU’s later and we have peace of mind on Downwind…
 
And sorry to hear about the dilemma! Hope you can relax and enjoy Vero Beach. …

I really think the very strong gust opened the gear door. What caused it to brain fart after that I’m not sure. I have scheduled shop time on the 21st so we’ll swing the gear a good many times and give the gear motor/pump attention too. I’ll report back on findings.
 
Gary, I have had the "in transit" light flash a number of times during turbulence. For a gear door to blew open it would need to be a broken linkage. As for the gear not coming down afterwards, that depends. Did the motor run? did the gear in transit light come on??? too much of a coincidence here......
 
I will mirror Ken here... I have had my gear transit light blink a couple of times during heavy turbulence. Just slow down and you you will be ok. Nothing unsafe about that as far as I can tell, but if it's starts turning on in smooth air, I would check for hydraulic leaks.

My advice would be to swap those little microswitches in the nose gear and inspect the others. They can be a little pricey, but worth replacing those. If you use lubricants like LPS, it can cause issues with them.

I would also consider installing a gear pump light. That could give you a big clue when you have an indication problem. If you don't have a green light BUT your pump stops like it it should (after the 8-12 seconds or so), you could be almost certain that's only an indication problem.
 
Whoa sorry to hear about the gear issues, never a fun one :) PS I like the FF checklist!
 
Even without the gear motor light, the ammeter or voltmeter will swing like crazy when the gear starts or burps.
 
It's not uncommon for the Gear Transit light to blip on in turbulence as the pump pulls the gear back up into the wells. And keep in mind on the e-dump that in addition to slowing to 85 knots, you also need to then pull back the throttle momentarily. Prop wash at 1/2+ throttle can keep the nose gear from locking down.

The gear e-dump is a very reliable gravity-based system, so I'd encourage everyone to go out to your local practice area and get familiar (or re-familiarize yourself) with it.
 
Chris, how old are your springs?
Originals, or have you purchased new ones from Welch Machine for peace of mind?
I decided that 50 year old springs should be retired…
If I remember correctly the nose gear springs were easily replaced but the mains were a two person job to get the new ones installed.

Rolf,

Mine are proabably original, I have not seen anything in the old logs, but seem to be in good shape. The e-dump test is pretty impressive. Have we heard of any significant failure or is it mostly peace of mind right now?

Chris
 
Even without the gear motor light, the ammeter or voltmeter will swing like crazy when the gear starts or burps.

That's a great tip Ken.
 
Keep in mind that when it does that it is only momentary and since the ammeter is kind of low in the panel, you may or may not catch it. I have the light and it comes on for such a short time when the gear droops that even it is hard to catch.
 
Chris, I just figured that 49 year old springs might be worn out. Welch machine sells all six for
less than $300. When I replaced mine, both of the old nose gear springs measured about 1/2” longer than the new ones. My airplane had about 1900 hours TT.
Lots of our Commanders have twice that many hours.
Since then, I have also had the actuators rebuilt.
Several years ago I had new brushes and a stator replaced in the power pack motor.
A little preventive maintenance trumps neglect.
 
Rolf, Sounds like a good investment. I'm adding it to next years upgrades.
 
I have a question. Is there a way to physically lock the gear to make the ten minute hop for service?
 
Perhaps don't touch the gear handle after you lift off and let the down lock check valve do its job? Are you concerned about an internal hyd leak? When you hit the master, did/do you get the normal "zip" of the pump initially building gear down pressure in the system? Of course, once that happens the first time, it may take several days before it will happen again.
 
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I have a question. Is there a way to physically lock the gear to make the ten minute hop for service?

Lift off.....Gear UP and once up, pull the 5 amp circuit breaker for the gear control circuit....DONT FORGET TO PUT THE GEAR BACK DOWN !!!

We had a situation in October and a couple times before where the gear would 'bump up' in turbulence and then the pump would just keep on running. I was able to make it happen with the plane on jacks and gear up by pulling on the nose gear and the pump would bump it back up but after a couple of (harder) pulls the gear would bump up and the pump would keep running. I believe the switch was broken internally and when pushed in too hard would open back up, pull in the logic relay (most of you don't have that - very early birds) and run the pump. I swapped the switch on the nose gear that is up closest to the firewall and problem solved. Very hard to diagnose and isolate.
 
Perhaps don't touch the gear handle after you lift off and let the down lock check valve do its job? Are you concerned about an internal hyd leak? When you hit the master, did/do you get the normal "zip" of the pump initially building gear down pressure in the system? Of course, once that happens the first time, it may take several days before it will happen again.



the plan is to not touch the gear selection and leave the breaker pulled until I get in the shop. should I reset the breaker and let it build the pressure as you mentioned then pull if the pump continues to run?

on occasion when I power up I’ll hear that quick “zip” but don’t remember always hearing it.
 
Tony,

good info! I’m reading through the troubleshoot guide and will have a copy with me. I really think the gusts caught the left main gear door and forced it open, but what do I know. I’ll know more once in the shop.
 
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