Service Bulletin All SBs
| SB Number | Revision | SB Type | Title | Date (YYYY-MM-DD) |
|---|---|---|---|---|
| SB 500-34-028 | B | Mandatory | IS&S GPS Week Rollover Correction (iFMS 2.7.8) | 2019-04-30 |
SB Reason
The GPS transmits the date and time in a specific format that consists of the current week and the current number of seconds in the week. The field that contains the week number is a 10-bit binary number. This limits the range of the week number to 0-1023 or 1024 weeks in total. The GPS week zero started on 06 January 1980, and the first reset of the 1024 weeks counter happened on 21 August 1999. The current reset happened on 06 April 2019. The software in the IS&S GPS receiver was supposed to correct for this rollover but it did not perform correctly.
SB Description
This Service Bulletin provides instructions for updating the IS&S GPS to correct the GPS date and time. Revision B of this Service Bulletin adds an additional GPS update method (IS&S SB1916). IS&S SB1910 updates the GPS through the Pilot’s Armrest USB port. IS&S SB1916 can be used in lieu of SB1910 and updates the GPS through the left or right PFD connector.
SB Compliance
Eclipse Aerospace Incorporated considers this to be a mandatory upgrade that should be accomplished within 90 days or 50 hours which ever comes first. Compliance with Rev A, does constitute compliance with Rev B.
Effectivity
Aircraft Serial Numbers: 000001 to 000262, 000266, 000267 with iFMS version 2.7.8. NOTE: This may also be applied to aircraft with iFMS 2.7.5.
Export Control
These commodities, technology or software, were exported from the United States in accordance with the Export Administration Regulations. These commodities, technology or software are intended for use only in the End User’s country. An export license from the U.S. Department of Commerce may be required before these products can be re-exported, transferred, transshipped on a non-continuous voyage, or otherwise disposed of in any other country, either in their original form or after being incorporated into an end item. Diversion of this end-item or its use contrary to any applicable U.S. government license or to U.S. law is prohibited.