Transatlantic Reinsurance Company

**Effective Date:** 5/21/81
**Endorsement No.:** 4
**Page:** 2
**Assured:** INTERNATIONAL BUSINESS MACHINES CORP., ETAL
**Certificate No.:** C81-36872
**Ceding Company:** NATIONAL LADON FIRE INSURANCE COMPANY
**Company Policy No.:** 9910600

It is noted and agreed that this Certificate is hereby amended as indicated below. All other terms and conditions remain unchanged.

THE TERM "AIRCRAFT PRODUCTS" MEANS:
3) TRAINING AIDS, INSTRUCTIONS, MANUALS, BLUEPRINTS, ENGINEERING OR OTHER ADVICE AND SERVICES AND LABOR RELATING TO SUCH AIRCRAFT OR ARTICLES.

□ Additional Premium Due $
□ Turn Premium Due $

□ Future Installments Unchanged
□ Future installments Revised*

*Due Date Present Installment Increase Decrease Revised Installment

Date prepared: 7/23/81
M.E.
Frank Vuktar
(Authorized Signature)