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Precision Aerodynamics' Mandatory Service Bulletin 1221


This page is updated often as questions arise
Frequently Asked Questions regarding SB1221

  1. How do I know if my canopy is affected by SB1221?
  2. Who can do the work on my canopy?
  3. How long will it take to get this work done if I send my canopy to Precision?
  4. What is the best way to package and ship my canopy and where do I ship it ?
  5. How much will it cost to have the work done ?
  6. Will you reimburse me if I have the work done by my local rigger?
  7. When will I get my Merchandise Credit Certificate?
  8. Why do I have to pay if this is a defective recall that is required by a mandatory service bulletin?
  9. I would prefer not to separate my canopy from the harness/container. May I ship the whole thing together?
  10. Can you repack my reserve after doing the SB work?
  11. How complicated is it to do the job to comply with SB1221?
  12. My local Senior Rigger has a very well equipped shop, including the right equipment. Does the work have to be done by a Master Rigger or can a Senior Rigger with the right equipment do the work?
  13. Why do you specify size 69 thread considering the fact that you use size 46 thread in the rest of your canopies?
  14. What if there isn't enough room to get a new bartack in the space specified between the existing bartack and the load bearing stitch row in the double needle chordwise seam at the lower surface?
  15. Is it acceptable to put the bartack above the loadbearing double needle stitch row of the lower surface chordwise seam as long as my bartack is still in the Type III tape?
  16. Why do you specify the 42 stitch 'end stop' bartack over the factory original 'center stop' bartack?

How do I know if my canopy is affected by SB1221?

Only a small percentage of our canopies are affected by SB1221. Broadly speaking, if your Dash-M reserve canopy was made between 1996 and 1999 it might be affected. We have put together a Precision Aerodynamics' Search Engine to precisely answer this question for you. Serial Numbers for every canopy we have ever produced have been placed into a database to help you determine whether your canopy is affected by SB1221 and to prepare for any future canopies/service bulletins that may become necessary at some future date.

Enter your serial number and a return message will tell you the the Model of your canopy and whether or not it is affected by SB1221.

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Who can do the work on my canopy?

You may either choose to send it to us at Precision, or you may choose to take it to one of our many dealers and associated drop zones or repair stations that are staffed with Master Riggers equipped to do the work. A listing of repair stations and Master Riggers will be listed here in coming days.

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How long will it take to get this work done if I send my canopy to Precision?

We have been able to turn many canopies around in the same day as we receive them, but in some cases they have shipped back out the following day. We keep an accurate log that indicates our average turnaround time is less than 24 hours. We will ship the canopy back to you by the same method you send it to us (overnight, second day, etc).

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What is the best way to package and ship my canopy?

Both Federal Express and UPS have morning delivery service with afternoon pickups at Precision Aerodynamics. We strongly recommend that you stay away from using the United States Post Office. Not only is the Postal Service slower, a canopy doesn't fit very well into a Post Office Box.

Remove the canopy from your container, daisy-chain the lines and place the canopy in a plastic bag before placing it in a corrugated cardboard box rated at least 200 psi  (the box rating is commonly found in a circle on one of the bottom box flaps). The primary purpose for the plastic bag is to confirm whether or not any punctures have occurred during transit. It is not necessary to attach the links to any kind of card or other device.

Ship via FedEx or UPS to:
Precision Aerodynamics, Inc.
727 Rankin Ave N.
Dunlap, TN  37327 USA


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How much will it cost to have the work done ?

Our charge of $50 includes SB1221 compliance as well as final inspection of your canopy and return shipping. If you sent it to us via overnight service, we will return it via overnight service. We appreciate your confidence in our products, and we want you to be pleased with our service and response. We hope that we can help retain your confidence by providing you with our Merchandise Credit in the amount of $100 toward the purchase of any future main or reserve canopy. This certificate will be returned to you with your canopy, and it is transferable to others without penalty.

We do know that there are several qualified repair stations who will perform the service of SB1221 for less than $50. Check with your dealer for their specific policy and pricing.

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Will you still reimburse me if I have the work done by my local rigger?

Yes, by means of Merchandise Credit. Your local rigger will have his own charge for providing the service, but upon completion of the work we will send you (or your rigger) a Merchandise Credit Certificate in the amount of $100 toward the future purchase of any main or reserve canopy we make. This certificate is transferable to whomever you wish, and may redeemed by the holder toward any future Precision Aerodynamics' canopy purchase. 

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When will I get my $100 Merchandise Credit Certificate?

Certificates are being printed this week. If you have already sent your canopy to Precision for the update, the certificate will be mailed to the same address we return the canopy, unless you direct us otherwise.  We should have certificates in hand before 1 February, after which the certificate will be returned with your canopy. If you have your own Master Rigger perform the update, then you'll need to send a photocopy of your packing data card with canopy serial number, and provide your mailing address so that we can send the certificate to you.

The Merchandise Credit Certificates are numbered, and each one is referenced to a specific canopy. 

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Why do I have to pay if this is a defective recall that is required by a mandatory service bulletin?

There is not a manufacturing "flaw" in your reserve, and it is not necessary to open your reserve container until the next scheduled repack is due. While the modification is mandatory, it is not a recall to fix a defect. It is to update the original version of Dash-M to a higher specification which is indeed stronger. The method of line attachment on the early Dash-M was tested thoroughly when the canopy was in development, and there have been hundreds if not thousands of terminal deployments on this version around the world during the past 7 years. It is because we saw isolated incidents of canopy damage reported to have been operated within the maximum operating limitations of weight and speed that initiated SB1221. If Precision performs the update, we charge $50 (which includes the return shipping) for the modification, but whether we do the work or the master rigger you choose performs this modification, you or your rigger will receive a $100 merchandise credit with Precision. You may use this yourself or transfer it to someone else for their use towards the purchase of a new main or reserve canopy.

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I would prefer not to separate my canopy from the harness/container. May I ship the whole thing together?

Yes, you may, but the shipping cost will be about double. As far as the work is concerned, it is not a factor.

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Can you repack my reserve after doing the SB1221 work?

We do not offer any reserve packing services, but we will be happy to ship your canopy to your rigger for repack.

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How complicated is it to do the job to comply with SB1221?

The work involved to comply with SB1221 is not really very complicated, but it must be done correctly and accurately by qualified personnel with appropriate Master Rigger rating (or foreign equivalent) and proper equipment. 

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My local Senior Rigger has a very well equipped shop, including the right equipment. Does the work have to be done by a Master Rigger or can a Senior Rigger with the right equipment do the work?

Compliance with SB1221 requires the work of a Master Rigger (or foreign equivalent) according to FAR Part 65.125 which states, in part:

Certificates: Privileges.
(a) A certificated senior parachute rigger may--
    (1) Pack or maintain (except for major repair) any type of parachute for which he is rated;

Compliance with SB1221 is considered a major repair, thereby requiring a Master Rigger's certificate.

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Why do you specify size 69 thread considering the fact that you use size 46 thread in other parts of your canopies?

Size 46 thread (B thread) has been appropriately used as common practice for sport parachutes for many years. However, many rigging lofts and parachute repair stations typically have a substantial stock of size 69 thread (E thread) that was a common practice for military parachutes like the C-9 or T-10. In an effort to make compliance with SB1221 easier for most repair facilities, we have specified the more widely distributed E thread for use in this service bulletin.

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What if there isn't enough room to get a new bartack in the space specified between the existing bartack and the load bearing stitch row in the double needle chordwise seam at the lower surface?

A Master Rigger may replace the line attachment loops on the canopy in the event there in not sufficient room to place the additional tack as indicated in SB1221. Details providing guidance and authority to replace line attachment loops will be posted here within a week or so (before 31 January).

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Is it acceptable to put the bartack above the load bearing double needle stitch row of the lower surface chordwise seam as long as my bartack is still in the Type III tape?

No. The additional 42 stitch pattern may be properly places ON the loadbearing stitch row, but in any case must not be placed ABOVE the lower surface loadbearing stitch row. If there is any question regarding this very important yet simple requirement, please contact Precision Aerodynamics, Inc. for clarification.

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Why do you specify the 42 stitch 'end stop' bartack over the factory original 'center stop' bartack?

One of the more common stitch patterns for a Singer 269W or equivalent bartacker is the 42 stitch end-stop pattern that is indicated in SB1221. The original configuration for loop attachment is a similar bartack except that it starts and stops in the middle. The reason we have specified the 42 stitch end-stop bartack is because there are many more machines out there in rigging shops set up to do this type stitch. Certainly there are very few (if any) machines set up to perform the center start/stop pattern, but because the machines we have at Precision are programmable center stop machines, we have included them in the SB.

Several people have called saying that they have a ZigZag machine of one sort or another, and some have called to say that they have a 38 stitch bartacker, but while these might be fine machines in their own right, they are outside the scope of the equipment requirement of SB1221.

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Copyright 2001  [Precision Aerodynamics, Inc.] All rights reserved.
Revised: December 06, 2013 .

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