Straight from the 'FedEx Surviving Family Guide'

If your spouse was an active pilot and had more than five years of credited service for vesting with the
Company on the date of death, you will be entitled to receive a portion of the pilot's benefit from the FedEx Corporation Employees’ Pension Plan and Non-Qualified Plans (if applicable) as early as the date that the pilot would have turned 55. If the pilot was 55 or older at the time death, the Retirement Service Center will send you a report of benefits (along with a retirement kit) within 60 days of receiving notification of your spouse’s death. If your spouse dies prior to age 55, you will be sent a retirement packet at the time your spouse would have turned age 55.

The benefit you receive is a monthly benefit based on your spouse’s credited service for benefit accrual and average earnings under the Plan on the date of death. Your benefit will be calculated as a 50% Joint and Survivor Annuity option that would have been available to the pilot. The surviving spouse will receive half of this amount. One exception is that, if a pilot applies for retirement and makes a valid unexpired election to commence retirement benefits but dies before the benefit commencement date, the spouse will receive the benefit the pilot elected. However, if the spouse defers receiving payments, the benefit the spouse receives reverts back to the equivalent of the Joint and Survivor Annuity. If you elect to receive this benefit prior to when the pilot would have attained age 60, there will be a reduction of 3% per year for each year (or .25% per month for each month) prior to when the pilot would have turned 60.

You may defer receiving payments until the pilot would have attained age 60. You can accomplish this in practice by just not returning the election forms. The Retirement Service Center will then send a follow up letter about 90 days before the pilot would have reached age 60. You may also elect to defer distribution up to December 31st of the calendar year your spouse would have attained age 72.

NOTE: You may request that your pension payment begin at any time after your spouse’s 55th birthday.
However, for any commencement before age 60, there will be an early retirement benefit reduction of .0025 for each month that the benefit commences prior to the first of the month following your spouse’s 60th birthday.

If a pilot is not married at the time of death:
No benefits are payable to a beneficiary. However, while not entitled to survivor benefits from the FedEx
Corporation Employees’ Pension Plan, a beneficiary may be eligible to receive benefits under the FedEx life insurance plans, Pilots’ Retirement Savings Plan (PRSP) and/or Flying Tiger Variable Annuity Pension Plan for Pilots (VAPPP).