Part #: 504-0035-906

Model: 520-2AG

Extant Aerospace - Attitude Indicator
product image
Part Number :

AIM 520
  • Backup Attitude Gyro
  • 2" case bezel mounted from the front or rear in shock-mounted panels
  • Standard tilt angles of 0, 8, and 15 degrees - optional adapters for other panel angles
  • 28 VDC input power
  • Red failure warning flag and rotating or fixed roll dial
  • Integral blue-white lighting with non-glare coating, optional 5 or 28 VDC lighting power available
  • TSO-C4c and AS-396-B compliant


Dimensions: 6.18"L x 2.4"H x 2.4"W (not including Caging Knob) Weight: 1.5 lbs. max
Mating Connector: JT06RE-10-5S(SR) Power: 28 VDC (Power Warning Flag appears when input is less than 17 VDC) 0.6 Amp max
Part NumberAttitude Indicator Description:
504-0035-9XX Part Number Chart


- Attitude Indicator
Price Condition Delivery

SEA Repair Capabilities: No

Click on a question below to see the answer. If you have a question about this model that is not answered below, please contact

Southeast Aerospace exchanges are based on the return of an undamaged, economically repairable core unit with identical part number as the unit shipped to the customer. An "economically repairable" core is defined as one where the cost to repair/overhaul (or Repair Cap) does not exceed 80% of the original SV/OH exchange price billed. Should the Repair Cap exceed 80%, the customer will be billed the additional amount. In the event this amount exceeds the Outright Price for the unit, the customer would only be billed the difference between the Outright Price and SV/OH Exchange Price with the core returned as-is to the customer.

Here is an example of such a transaction:

$1000 Exchange Price charged to customer
$1000 x .8 = $800 Maximum Allowable core repair charge or Repair Cap

$2000 Cost to repair core unit
- $800 Less Core repair cap
$1200 Additional billing amount.

2200.00 Total Cost of transaction

Please Note:
SEA offers exchange on new items as well. However, repair cap as indicated above is still based on SV/OH exchange price.
No, not all and they could be damaged if you do.

Many legacy electromechnical attitude gyroscopic instruments include a caging device to hold the gimbals in place and 'force' the gyro gimbals to return to their home position. This instantly erects or resets the unit by pulling the caging knob. Some caged gyros include a cage lock mechanism, some do not. Some people believe that a cage-able gyro should always be in the locked position when handling, transportation, or storage takes place. This is not always the case.

For example, L3, manufacturers of the legacy AIM gyro product line, specifically indicate in their installation manuals and service letters that "instruments without cage locking mechanisms are designed to be shipped in an uncaged condition...using external locking devices to cage the indicator may result in damaging the caging system...". Southeast Aerospace has seen many people use external means to force a cage lock such as a spacer wedged between the extended shaft and knob. As indicated by L3 (AIM), this could very well damage the unit since you are forcing it to do something it might not have been made to do.

Most, if not all, gyro manufactures have detailed instructions within their installation and operation manuals that indicate how a specific model instrument should be handled, transported, and stored. This includes instructions on whether or not to cage lock the instrument or not. Always follow the manufacturer's instructions.

(Cage-able but does not have cage lock locking mechanism)

(Cage-able but has cage lock)