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munirabbasi

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Posts posted by munirabbasi

    APU Start

    in C-130 Technical

    Posted

    On 2/24/2022 at 2:07 AM, Nate Anderson said:

    Good afternoon all,

       I'm having a problem with the C-130J APU. Every time we place the APU control switch to run the APU begins to start, the EGT and RPMs start to rise. Been checking all the relays and such not finding anything. Anybody seen this before?

    ASR malfunction

    Munir Abbasi

    Steering control valve

    in C-130 Technical

    Posted

    13 minutes ago, Md Abu Sufian said:

    The air crew were detailed to carr out a regular cargo msn on route  Bunia to goma in C-130B ac ser no 0962.During the takeoff roll,after 60 knots, capt shifted his  hand to flt con leaving the nose wh   steering as the normal procedure.  but at about 80 knots the ac suddenly swung to the left,the capt immediate decided to abort the msn and ac control by applying differential braking with the help of the co-pltand nose wh steering input.

    Finaly we suspected that nose steering control valve malfunction during ac speed 80 knots. What might be the reason can anyone  inform.  Thanks  in advance. 

    Also  check LDG torque strut all  Strut are same hard or soft  and check for Air pressure if soft all  strut pressure should be 415 PSI

    Munir Abbasi

    Steering control valve

    in C-130 Technical

    Posted

    7 minutes ago, Md Abu Sufian said:

    The air crew were detailed to carr out a regular cargo msn on route  Bunia to goma in C-130B ac ser no 0962.During the takeoff roll,after 60 knots, capt shifted his  hand to flt con leaving the nose wh   steering as the normal procedure.  but at about 80 knots the ac suddenly swung to the left,the capt immediate decided to abort the msn and ac control by applying differential braking with the help of the co-pltand nose wh steering input.

    Finaly we suspected that nose steering control valve malfunction during ac speed 80 knots. What might be the reason can anyone  inform.  Thanks  in advance. 

    Steering control valve lost spring tension It is, mal function of the component, install gauge check pressure on neutral position at point mention on TO (40 psi )as as per TO

    regards

    Munir abbasi

    Intermittent transform rectifier unit

    in C-130 Technical

    Posted

    6 hours ago, Cc5 said:

    Still dealing with this issue unfortunately.  We noticed during takeoff tr3 load skyrockets 15%+ above tr1 inducing a dc bus overload.  It will repeatedly fail and recover for 2 seconds a handful of times only during takeoffs.

    Check grounding /bonding wire of unit

    regards

    Munir Abbasi

    Utility pressure gauge

    in C-130 Technical

    Posted

    On 8/5/2021 at 1:07 AM, Leakybirds said:

    What could be causing a slow moving utility gauge. Pressure reads fine on aux pump, normal and emergency gauge. Just utility gauge shows hesitation. Transmitter and gauge have been replaced. Could it be the util accumulator? Thanks for the help. 

    Replace transmitter snubber

    Regards

    Munir Abbasi

    Utility pressure gauge

    in C-130 Technical

    Posted

    On 8/4/2021 at 1:07 PM, Leakybirds said:

    What could be causing a slow moving utility gauge. Pressure reads fine on aux pump, normal and emergency gauge. Just utility gauge shows hesitation. Transmitter and gauge have been replaced. Could it be the util accumulator? Thanks for the help. 

     

    On 8/4/2021 at 1:07 PM, Leakybirds said:

    What could be causing a slow moving utility gauge. Pressure reads fine on aux pump, normal and emergency gauge. Just utility gauge shows hesitation. Transmitter and gauge have been replaced. Could it be the util accumulator? Thanks for the help. 

    Check pressure relief valve

    regards

    munir abbasi

    Underfloor heat inoperative

    in C-130 General

    Posted

    On 6/13/2021 at 9:10 AM, Farhanz said:

    Underfloor heat inoperative

    1. Underfloor heat thermostat plug remove install.
    2. Underfloor heat switch replacement.
    3. Swtch toggle replace
    4. Corrosion treatment temp cont valve
    5. Thermostat replacement 
    6. Temp cont valve replacement 
    7. Replacement underfloor heat
    8. Wire No H230A20N repair
    9. Terminal 15 at TB42L retighten
    10. Thermostat replacement 
    11. Temp cont valve replacement 
    12. Shut off valve interlock relay replacement.
    13. Underfloor heat replacement 

    hello guys, need an opinion to solve this recurring defect. Is there any other step should be done to solve this issue?

    EMER DEPRSS & floor heat S/O Valve interlock relay replaced

    Best Regards

    MUNIR Abbasi

    Intermittent transform rectifier unit

    in C-130 Technical

    Posted

    7 hours ago, Cc5 said:

    Greetings,

    We’ve been having an ongoing RTRU issue that only occurs in flight, usually a couple of times during touch and gos/takeoff.  TR3 load will drop below 5, kick out a fail for 2-3 seconds then recover and go back to functioning properly. A few things we’ve changed include the TR unit, BIU, as well as the associated diode.  
     

    Was curious if anyone has seen a similar issue or has any input on potential culprits.  All meter readings weve checked have been good, as it does not fail on ground.

    Model of aircraft

    Best regards

     

    Munir Abbasi

    Brake System - Description & Operation

    in C-130 Technical

    Posted

    5 hours ago, badr said:

    i'm wondering if the park brake is effective without system pressurised.

    actually , i parked the aircraft facing a downslope but when we shut down the engines the aircraft started to roll!!! which was freaking!!!! have anyone experienced that before or have any explanation?

     UTY/AUX Accumulators Pressure is available for application of brake pressure.

    Best Regards

    Munir Abbasi

    Transfer of hydraulic fluid

    in C-130 Technical

    Posted

    45 minutes ago, Leakybirds said:

    Thanks for the replies guys. It is a 92 h model. Since my post I have replaced normal selector valve, utility accumulator and ground test valve. Still having issues. Looking into emergency selector valve and shuttle valve  During flight of 8 hours its transferring 2 quarts from aux to utility. 

    Dear It seem to (perhaps) ,your  mechanic were doing wrong ways for depleting the aircraft brake pressure without  energizing DC buses.

    Munir Abbasi

    Main Landing gear

    in C-130 Technical

    Posted

    18 hours ago, casey said:

    Make sure that the ring for the chain is connected to the side of the pin and not to the button.  If the chain is connected to a ring on the button, it can release the pin if the chain is pulled on.  

     

    Thanks

    Munir Abbasi

    Main Landing gear

    in C-130 Technical

    Posted

    6 hours ago, larry myers said:

    Fourteen years on C-130s, never lost this pin.  

    As nascarpop posted above, best to insert pin front to back.

    Sir  You never observe  ball of pip pin become  U/S or spring  lost his tension

    Munir Abbasi

    Main Landing gear

    in C-130 Technical

    Posted

    1 hour ago, Muhammad Arsalan said:

    Question is... What are the possibilities for quick release pin to come off from the hole of stowage rod inside main landing gear along with broken chain during flying mission?? 

     Upper Pip Pin of doors of Main LDGs are secured with safety chains normally  but   pip pins should be checked by C /chief in every schedule inspection for serviceability ie  two balls,with passage of time ball spring loaded are  be come U/S one or both.  you cannot insert the pip pin during flight /landing/takeoff. It seem to be negligence of crew crew chief 

    Best Regards

    Munir Abbasi

    SEA Period C-130 Door/Ramp Question

    in C-130 Technical

    Posted

    3 hours ago, Duke said:

    Hi folks.  Looking to verify something I was told recently about SEA vintage C-130s.  Was it possible to lower the ramp/open the cargo doors in flight from the flight deck?  If so, would that have been done by one of the pilots or the FE?

     

    Thanks

    Yes

    Munir Abbasi

    Colombian Air Force C-130 Ditching

    in C-130 Technical

    Posted

    2 hours ago, Duke said:

    Curious if any of you remember the ASC engineering team (me and a young captain) who went around the world giving a briefing on this ditching?  We also did a video of the briefing some of you might have seen.  I was told the briefing was still being shown well into the late 90s.  

     

     

    Yes

    Best Regards

    Munir Abbasi

    APU generator OUT light ON,while there is frequency, volatage and Load

    in C-130 Technical

    Posted

    2 hours ago, NATOPS1 said:

    Sounds like a bad GCP: internal (PIR) or internal TR... Make sure your GCP is the same manufacture as your generator; ALSO make sure the GCP is fully seated in the rack and might want to "adjust it" with a quick hit/rap/ wack to get all the connections to make good contact.   SWAP with one of your Eng Gen CGPs to be sure.  

    Sir When the  load of generator was observed satisfactory in every  operation checkout of the system it is malfunction of GCP (PIR)  wiring.

    Best Regards

    Munir Abbasi

    APU generator OUT light ON,while there is frequency, volatage and Load

    in C-130 Technical

    Posted

    On 4/20/2021 at 10:08 PM, Kaydee said:

    I am currently facing a challenge where my APU generator OUT light comes ON, but the frequency and voltage is with allowable limit, also, there is load indication. We have changed the contactor, Voltage regulator and the even the APU regulator but the discrepancy persist. Pls I will appreciate any quick response . Thanks 

    Kindly check the wiring of auxiliary switching contact of the K-53E and GCP (PIR).

    Munir Abbasi

     

    out light.png

    Pressurization Issues/erratic

    in C-130 Technical

    Posted

    18 hours ago, pgindy said:

    Hello everyone,

    For the past month or two we've been having an ongoing issue with pressurization on our J model.  The problem typically gets recognized when flying at higher altitudes, 19-20k ft, thought recently they've stated they had erratic pressurization at all altitudes.  Initially the problem was erratic pressurization throughout flight, resulting in ears popping and discomfort, when at higher altitudes they received a CAB Alt high advisory because cab alt was indicating above 10k ft.  We change a part, it flys 1-2 times and the problem comes back.  We've changed the outflow vlv, cabin pressure controller, vacuum reg, and servo valve, some things have been changed twice to no avail.  Anyone dealt with something similar/have any potential suggestions?

    Thanks!

    Check the system As per Service News

    Best Regards

    Munir Abbasi

    V25N01.pdf

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