STORAGE

 

TTP	B1-L1	ATA10
Beech 90 Series	B2-L1	Parking/Mooring storing and return to service

ENGINE STORAGE

Flight-Ready Storage (0–7 Days) Engines inactive up to 7 days may be left in an inactive state without preservation provided that:

•  The engines are sheltered

•  The humidity is not excessively high

 

    • The engines are not subject to extreme temperature  changes which produce condensation.

Short-Term Storage (8–28 Days) Engines inactive longer than 7 days, but less than 29

days, require no preservation provided that all engine openings are sealed off and the

relative humidity in the engines is maintained at less than 40% as follows:

1.     Place  six  8-ounce  bags  of  desiccant  on wooden racks in each engine exhaust duct. Ensure that the desiccant bags are not in contact with any engine parts.

 

2.     Place humidity indicators in the ducts so they are visible for later inspection.

 

3.     Seal off the engine openings with barrier material. Provide suitable moisture-proof windows in the material used over the exhaust ducts for observation of the humidity indicators.

 

4.     Inspect the engines and the humidity indicators periodically. If the relative humidity indicated is less than 40%, no further action is required. If the humidity indicated is 40% or greater, replace the desiccant bags with freshly activated bags.

Intermediate-Term Storage (29–90 Days) Seal  engines  inactive  for  a  period  exceeding

28 days, but less than 91 days, as instructed in SHORT  TERM  STORAGE  after  cleaning  the

engine and preserving the engine fuel system as follows:

1.     Wash engine externally  (refer  to  Chapter 71 - “Powerplant”).

 

2.     Perform a compressor performance recovery/desalination wash and turbine rinse.

 

3.     Examine all engine external protective coating, and touch-up/repair as necessary.

 

4.     Lubricate all linkages

 

5.     Disconnect fuel inlet  to oil-to-fuel heater and connect suitable oil supply line to oil-to- fuel heater fuel inlet. Blank off disconnected fuel supply line.

6.     Disconnect fuel line at flow divider inlet to prevent preservation oil from entering fuel manifold, and loosen line as required to permit drainage to a suitable container.

7.         Feed preserving oil (PWC05-007) at 5 to 25 psig at least 60°F (16°C).

8.     With the ignition system OFF, fuel condition lever to GROUND IDLE and power control lever to TAKE OFF, carry out normal motoring run until all preservative is dis- placed. During motoring run, move power control lever from TAKE OFF to GROUND IDLE and back to TAKE OFF and fuel condition lever from GROUND IDLE to OFF and back to GROUND IDLE to displace fuel from the system.

 

9.     After motoring run, check to see if preservative oil is coming from the opened fuel line. If not, repeat the motoring cycle until preservative oil flows from the opened fuel line.

10.   Return the power control lever to GROUND IDLE and the fuel condition lever to OFF. Reconnect the fuel supply to the oil-to-fuel heater and the fuel line to the flow divider inlet.

 

11.       Install caps, covers, and plugs as necessary to prevent entry of foreign material and accumulation of moisture.

Engine(s) Inactive for Periods Exceeding 90 Days

 

1.     Perform  the  0–7,  8–28,  and  29–90  day procedures.

 

2.     While  observing  starter  motor  operating limits, close the fuel firewall shutoff valve and the motor engine with the starter until the oil pressure and Ng are indicated. Disengage the starter.

 

3.     Drain the engine oil per applicable engine maintenance manual.

 

4.     With the drains open and the ignition off, motor the engine to permit scavenge pumps to clear the engine, indicated by a cessation of a steady stream of oil from the drains. To prevent excessive operation with limited lubrication, limit the rotation to the shortest possible time to complete the draining.

 

5.     Remove the oil filter element and allow to drain.

 

6.     Let the oil drain from all drains to a slow drip, approximately one drip per half hour, then install the oil filter and close the drains.

 

7.     Remove the covers from the accessory drive pads and spray exposed surfaces with engine oil. Replace the cover plates.

8.     Coat all external flanges, bolts, and studs with compound (PWC09-003). Pay particular attention to the reduction gear box and compressor case inlet flanges.

 

9.     Install caps, covers, and plugs as necessary to prevent entry of foreign material and accumulation of moisture.

 

10.   Tag the oil filter cap with the date of preservation and enter the date and type of preservation in the engine log book.

 

11.   Install the humidity indicator in the air inlet and exhaust of the engine compartment. Cover with a suitable airtight moisture barrier. Provide inspection windows at each end for observation of the humidity indicators.

Engines Inactive for Periods Exceeding 1 Year

 

1.     Perform   all   of   the   above   preservation procedures.

 

2.     Remove the engine and store in an approved storage container.

  3.     Remove all barrier material and all shipping plugs, caps, and covers from the engines.

4.    Remove all desiccant bags, humidity indicators, and wooden racks from each exhaust duct.

 

5.    Remove all covers, tape, tie downs, and tags  from the aircraft.

6.    Remove the control locks as instructed in Chapter 10 of the AFM.

7.    Service  the  oil  tanks  with  engine  oil as instructed in Chapters 10 and 12 of the AFM.

8.    Connect a supply of engine fuel to the fuel inlet port on the fuel control assembly. Refer to 

       Chapter 10 of the AFM.

 

9.   Disconnect the fuel line between the fuel control assembly and the fuel shutoff valve. Connect a line to the fuel control assembly to drain overboard.

 

10.     Motor the engine, without ignition, while moving  the  condition  lever  from  LOW IDLE                to OFF and back to LOW IDLE and while moving the power lever from TAKE- OFF to                  IDLE and back to TAKEOFF, until clean fuel flows from the overboard drain.

11.   Stop motoring the engine. Return the power control lever to IDLE and the condition lever to CUTOFF. Disconnect the overboard drain line. Connect the fuel line between the fuel shutoff valve and the fuel control assembly.

 

12.   Start the engine by the normal start procedure and operate it for approximately three minutes.

 13.   Stop the engine. When the engine has completely stopped, shut off the fuel supply to

 the engine.

14.   Inspect all lubrication and fuel lines for evidence of leakage.

 

15.   Remove, inspect, clean, and install the fuel strainer element as instructed in Chapter 12 of the AFM.

 

16.   Remove, inspect, clean, and install the oil filter element as instructed in Chapter 12 of the AFM.

 

17.   Thoroughly clean the aircraft, then perform a visual inspection and a test flight.

Battery Compartment

 

1.     Disconnect and remove the nickel-cadmium battery, then place it in a suitable storage area.

 

2.     Clean the battery compartment, quick disconnect plug, cables, and vent hoses with a solution of 5 ounces of boric acid dissolved in one gallon of water, then rinse with clean water and allow to dry.

 

3.     Seal the battery vent tubes and cover the quick-disconnect plug with barrier material.

Fuel Cells

 

1.     If the aircraft is to be in storage 90 days or less fill the fuel cells to capacity with fuel to minimize fuel vapor and protect the cell inner liners.

 

2.     If the aircraft is to be in storage longer than

90  days,  drain  the  fuel  cells,  then  flush,

spray or rub a thin coating of light engine oil on the inner liners of all fuel cells.

 

Propellers

 

Remove dirt, oil, and bug accumulation from the propellers with cleaning solvent then coat the blades with corrosion preventative compound. Wrap the propeller blades with barrier material and secure with tape. Touch up the propeller spinners with paint as necessary, then secure blades with propeller sling to prevent rotation.

Avionics

 

Clean and cover with barrier material any equipment sensitive to dust or moisture. Take any additional precautions recommended by the manufacturer of such equipment.

 Instruments If the aircraft is to be in storage for more than 90 days, cover the instrument

panel with barrier material and secure with tape.

Seats Clean the seats and install protective covers.

 

 Stall Warning Unit If the aircraft is to be in storage for 90 days or more, cover the stall warning unit with barrier material to prevent collection of dust, debris and moisture on the transducer.

Landing, Strobe and Taxi Lights

 

If the aircraft is to be in storage for 90 days or longer, cover the landing, strobe, and taxi lights with barrier material and secure with tape.

Flight Control Surfaces

 

1.     If the aircraft is to be in storage up to 90 days, install the control surface locks as instructed.

 

2.   If the aircraft is to be in storage longer than 90 days, lubricate all hinges, bearings, bell- cranks,  chains,  and  quadrants  and  apply corrosion preventive compound. Place the flaps in the retracted position.

 

Wing Flap Tracks and Rollers

 

If the aircraft is to be in storage over 90 days, apply corrosion preventive compound to the flaps tracks and rollers. Place the flaps in the retracted position.

Landing Gear

 

1.     Clean  the  brakes  and  apply  a  coating  of primer to the brake discs.

 

2.     Cover the wheels with barrier material and secure with tape.

 

  3.    Check the air pressure in the tires periodically. It is recommended that unserviceable tires be used for prolonged storage.

4.     Coat the exposed surfaces of the shock strut pistons and the nose gear shimmy dampener piston with preservative hydraulic fluid for each strut position to prevent bottoming of the strut when deflated. Install the collar.

 

Hydraulic System

 

Fill the hydraulic reservoir with MIL-H-5606 hydraulic fluid as instructed and inspect the system for leaks.

Loose Tools and Equipment

 

If the aircraft is to be in storage over 90 days, remove the loose tools and equipment and store them in a room of low humidity.

Airframe

1.     Install the air inlet covers.

 

2.     Install the pitot tube covers. Cover the static ports with barrier material and secure with tape.

3.     Install the bleed air intake scoop plugs.

4.     Clean all exposed antennas and connections.

 

5.     Remove the windshield wipers, wrap with barrier material and secure with tape. Store the wipers in the cockpit or with the loose tools and equipment.

 

6.     Cover  the  windows  and  windshield  with strippable coating or the preferred adhesive paper.

REMOVAL FROM STORAGE

 

1.     Remove all barrier material and all shipping plugs, caps, and covers from the engines.

 

2.     Remove all desiccant bags, humidity indicators, and wooden racks from each exhaust duct.

 

3.     Remove all covers, tape, tie downs, and tags from the aircraft.

 

4.     Remove the control locks as instructed.

 

5.     Service  the  oil  tanks  with  engine  oil  as instructed.

6.     Connect a supply of engine fuel to the fuel inlet port on the fuel control assembly.

 

7.     Disconnect the fuel line between the fuel control  assembly  and  fuel  shutoff valve. Connect a line to the fuel control assembly to drain overboard.

8.      Motor the engine, without ignition, while moving  the  condition  lever  from  LOW IDLE to OFF and back to LOW IDLE and while moving the power lever from TAKE- OFF to IDLE and back to TAKEOFF, until clean fuel flows from the overboard drain.

9.     Stop motoring the engine. Return the power control lever to IDLE and the condition lever to CUTOFF. Disconnect the overboard drain line. Connect the fuel line between the fuel shutoff valve and the fuel control assembly.

 

10.   Start the engine by the normal start procedure and operate it for approximately 3 minutes.

11.   Stop the engine. When the engine has completely stopped, shutoff the fuel supply to the engine.

 

12.   Inspect all lubrication and fuel lines for evidence of leakage.

 

13.   Remove, inspect, clean, and install the fuel strainer element.

 

14.   Remove, inspect, clean, and install the oil filter element.

 

15.   Thoroughly clean the aircraft, then perform a visual inspection and a test flight

PTP  Beech 90 Series	B1	LOC		SGH
	B2	LOC		SGH