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Posts posted by Nc97

  1. All,

    Been playing around in Afghanistan the past few months with this G-222 (C-27A) aircraft.

    Got me a good APU problem that may translate well from some of your Herc APU/GTC experiences. This APU will run just fine, loaded, unloaded, for roughly 5 top 10 minutes, then abruptly shut down. This happens either in flight, or on the ground.

    I have eliminated the Oil Pressure Switch, the Hot Oil Temp Switch, the Speed Switch, the Ignition Control Unit, and the fuel filter. Cracking Pressure I would assume is fine as it starts smoothly, and doesn't "burp" or appear to be struggling for fuel before shutdown. I do not have a gauge available to verify though.

    Befor I start shotgunning parts (I was thinking oil pump or fuel cluster) I thought of you guys. Any help and/or thoughs would once again be appreciated.


  2. I know the 1C-130H-2-21JG-10-1 states that the Engine Pressure Regulator must indicate between 38 and 52 PSI, or between 70 and 74 PSI for AC-130U airplanes, or between 56 and 70 PSI for MC-130E/H/W airplanes in the "ON" position, but what does the -1 Flight Manual mandate?

    Looking for an agreement (or disagreement) between the maintenance manual and the flight manual.


  3. Do you hear the igniter going, have you got fuel, the valve in the armpit, is it open? Your filter fuel drain at the bottom is it clean? Have you got fuel in your X-feed manifold. Maybe failed 3 Psi oil press sequencing switch. If no oil press, use the priming button.

    Used to know exactly what pins to jump to eliminate the oil pressure switch. If memory serves me correct the GTC oil pressure swith was 4 pinned while the APU oil pressure switch was 5 pins. Anyone know what pins to jump?

  4. If the problem appears to be altitude related, replace, as necessary, the oil tank pressurizing valve (old valve P/N 697218-l set at 3.5 +/- 0.5 PSI, new

    valve P/N 697218-3 set at 5 +/- 0.5 PSI):

    If you are referring to the pressure relief valve, the P/N is 411600-3, NSN 4820-00-484-9024, and is set to 5 +/- 0.4psig from 2 CFM through 10 CFM IAW SMP850-79-13, REV 21. 697218-1 is discontinued withuot replacement, and no such part number (-3) exists IAW FedLog.

  5. Jump pins A-C on speed switch cannon plug and listen for Geneva Lock (Fuel Shutoff Actuator) opening and closing. (And it was condition lever to Ground Stop...correct?).

  6. Reminds me of a time when crews used to low speed the engine, and bump up the throttles a little. This lead to a flame out for which we had we told to perform a flame out inspection. Managed to talk our way out of it because we explained the four inputs, TLA, RPM, CIP, and CIT. When the crew low sped the engine and bumped the throttles to lower the oil temp, this affected the TLA and RPM, causing the flame out. Thoughts?

  7. Most of you are correct, however we (yes I was the FE on the plane) were going to Bangor Maine to RON. The next day we were scheduled to depart for England. This incident happened over upper New York, and yes it was inflight. Gear Box came apart at 22,000ft if I remember correctly, happened in September 1988/89 (long time ago). Took out number 4 engine. Did a two engine landing at Pease AFB. Melted the right brakes stopping the airplane. That’s the short story. By the way that second picture with the intake plug was from another incident.

    Incredible story, my hats off to you and the rest of the crew.

  8. Lkuest, agreed on all points except one. Could this really have been survivable if it happened in flight? I would have bet on a ground mishap. Perhaps some flyers can weigh in on something this catastrophic?

  9. Yeah. Since the 1980's they were always a part of the informal plant tours whenever I'd be there TDY for a class or a conference. They were produced, certified, then parked, and never touched. Even the tire pressure was left neglected and the were half flat. There are some pics of them in the gallery.

    Anyone got the production numbers so I can locate them in the gallery?

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